Well...there's several choices and everyone has their favorites...
I love my Replicator 2 now that I've done all the mods...I MEAN FIXED IT....it's a printing machine. I also have a Delta Orion and a Printrbot Go V2.....and have owned other printers.
Depending on your needs you might get radically different suggestions.
Small but very detailed parts? Large medium resolution? (those are two of the usual choices).
PLA only? Add ABS? Nylon? PC? T-Glase?
This might start a small flame war though...it has in the past.
Since this is a Makerbot Forum let me start with...My R2 is one of the best I've used (in my limited experience). Is it the best? No....but the software (including sailfish), the 3rd party parts, and active forums make this a serious contender.
A lot of people are talking about Craftbot...(I have 2 coming next month from Indiegogo crowd funding)
Solidoodle has a whole new ecosystem of printers coming out...
If you are looking at a Delta style machine...Boots Industries has their new one coming out....12" OD x 12" high...can go up to 3 heads and 3 different nozzles....
Ultimaker 2 is an excellent choice but more $$$...
Some are getting really good parts off even the Printrbot Metal Simple....
WHAT do you need it do ?
Jay