I got a NEC 500 lumen LED projector (NEC NP-L50W) from CDW. It's pretty sweet! Because it's LED, it takes moving abuse pretty well (versus a regular lamp).
It also has built-in software for PowerPoint, Word docs, PDFs, and videos. It'll take HDMI, component, or USB for video.
It's very small & light, come with a remote, does auto-adjust, auto-keystone, etc.
I think I payed about $600 for it.
Check CDW.com; they have lots of projectors from 100.00 and up.
I strongly suggest to stay away from a lamp or bulb type, because the lamps tend to be fragile and expensive.