JVC isn't under $3,000 new, but if you look at classifieds and do some searching you may find a b-stock (used) JVC RS420, RS440, DLA570, or DLA590 for around $2,000. IMO, the jump to the quality that JVC offers is worth looking for. But yes, Epson is a solid company with a good reputation.
As for screen size, about the only thing I can recommend is that you consider getting the projector first, then shine an image on your wall to determine screen size that suits you to the most. If you are size limited, then that matters and you may have to live with it.