I went with the Solidoodle 2, mainly based on price and the fact that it seemed like a nice printer. It is quite a nice printer, and it also has a very good community of people surrounding it (on http://soliforum.com), but if you’re looking for a kit you can partially assemble yourself it’s not really the way to go as it comes fully assembled and rough calibrated (but there’s always plenty of fine tuning you can do yourself, too). As with any 3D printer aiming to compete on price it does take a few shortcuts to achieve that price, and while none of them are really awful they do occasionally produce annoyances. But, it’s still a printer I feel good recommending to people looking for their very first printer, and I think it’s at the top of the pack for budget minded kit/assembled printers.
If I had it to do again, though, I’d give serious thought to the Bukobot (http://deezmaker.com/) or the OrdBot Hadron (kits are available from various places, but http://www.automationtechnologiesinc.com/products-page/3d-printer/3d-printer-mechanical-platform-no-controller is the link I have in my bookmarks for some reason).
The printrbot (http://printrbot.com/) also seems quite popular, especially in this community, but people in the community who I find quite trustworthy have some issues with it and I would recommend the RepRap Wallace (http://reprap.org/wiki/Wallace) over the printrbot. The Wallace, as the wiki page says, is based in large part on the printrbot but designed to fix a few perceived issues with the printrbot.
Unfortunately, the Wallace isn’t an easy build, and isn’t really a good choice for a first printer. The designer of it (who goes by Whosa Watsis here on G+) is also one of the guys involved with the Bukobot, and he’s currently designing the Wallace 2 which looks even more promising than the original. But the Wallace 1 and 2 are probably things you’re better off filing away in your bookmarks as interesting things to come back to when you’ve gotten some time in on your first printer and find yourself thinking you ought to build another (which is a very common thing).