Welcome to our hobby!!!
I recommend one of the BF20's myself... IMO they are a step above the X3 and the fit and finish is great. I think i will have well under $2000 in mine after the cnc conversion...
check out one of Hoss's site @ g0704.com
or if you want to go with an X2 he is also the authority on that machine as well, Hossmachine Homepage
if you think you need something bigger than the G0704 then check out Hoss RF45 clone, he has a link on the hoss machine homepage for it. But honestly unless you do really big parts the G0704 can tackle a lot.