I've owned at least one volume from pretty much every version and I bought the first 3 "Omnibus" editions on accident (I preordered them together before the 1st volume hit and forgot to cancel them when it was revealed Vol 1 was censored.)
The Vizbigs are the best physical quality (As in Page Quality and printing Quality) and has the most in regards to Toriyama-colored pages from the original WSJ Run (Tho not all) but you've got to put up with all of the censorship from previous releases. It's all there.
The 3-in-1 Edition with the Kanzenban covers are honestly not as bad as others have made them out to be. The first volume is indeed censored, but Viz claims this is a printing error and indeed, my volume 2 and 3 are completely uncut! Bulma's top being pulled down to coat the invisible Man in Kamesen'in's blood for example is there in all it's glory. Popo doesn't appear in the volumes I own, but I've been told by others his lips are indeed still censored. And… I don't count this as censorship because I think it DOES honestly look better, but Advisor Black's lips are edited too. They aren't removed like Popo's are tho, they're just colored in to be the same color as the rest of his body whereas originally his skin tone was shaded dark but his lips were paper white. Now the lips are the same color as the rest of him, which to me is more fixing an art mistake, but some purists have called foul.
Also, the paper quality IS poor compared to the VizBigs but it isn't as bad as others have made it out to be. I've never felt as if I was in danger of ripping the pages, they all feel like decently sturdy paper altho, sometimes the pages are thin enough that you can see the content on the other side during a casual read. So, while they aren't great, they aren't quite "Hotel Bible" paper quality as I've seen some claim. Another major downside is that it uses the Kanzenban covers... but DOESN'T have color pages period... kinda disappointing.
Also, one thing I find neat about this release, they've said this is gonna be the first time Viz releases the manga titled as it is in Japan. From what Viz promised, this entire release from Pilaf to Boo will simply be called "Dragonball" which I find neat.
The full color edition is amazing. It even includes completely untouched SFX. As someone who knows Japanese, I don't mind that they aren't translated till the back because I know what they mean, but I can see how that'd upset some. Again, Popo's lips appear to be censored, but no other censorship has (yet) been observed in them. I haven't seen any either but I don't remember the Saiyan stuff being too heavily cut. The only downside I can gleam from these, is I can see some purists who don't like the color and want it as originally printed.
Also, they started at Z (as is customary for some reason...) and there is presently no indicator there will be a release of the original DB... so yeah, It's probable they will, but you never know.
All of these use the same translation so no sense comparing. It's the same translation Viz has used for decades, tho, the 3-in-1 and Full Color releases haven't yet gotten to Mr. Satan, Djinn Boo, and Vegerot... it'd be neat to see if they do any different there, at LEAST the supposedly "uncensored" 3-in-1 edition should leave "Mr. Satan" intact, so they don't have to edit the "SATAN CITY" stuff... but we'll see.
The best edition I own are the Kanzenban. I know this isn't in English so nobody here is probably going to buy it, but it's GORGEOUS!! The page quality is, bar none the best of any manga I own (As are my YYH Kanzenban) and look beautiful. The color pages are ALL here. Every. Single. One. none are missed, including the few times he did a full chapter in color.
Some people are upset by the two art edits in this edition. One is a cigarette being removed from Bulma's hand on a chapter title page from early DB (only then because she was underage at the time) and they fixed an English mistake. The "WELCOME" sign entering the Afterlife originally said "WELL COME" and has now been corrected to "WELCOME". I've actually seen some people bitch bout this like it's a big deal.... the Cigarette thing... ok, MAYBE.... if it were in the story and not a title page, but the WELCOME thing?! C'mon...
I recall someone mentioning another art mistake that was corrected with Tenshinhan during one of his early appearances, but I can't recall that one off the top of my head, so you can imagine how minor that one is.
Overall, I'd say if quality is your thing and you like color, the Full Color Edition.
If you want it in its original black and white, I'd go with the 3-in-1 actually due to the being nearly uncut.