Keep in mind that projecting "across" your room will create a 60"+ image, unless your room is a closet. Typical throw ratios of these pico projectors are between 1.6 and 2.0, meaning at a projection distance of 10 feet, they will create a 10/1.6 = 6.25 ft wide image to a 10/2.0 = 5 ft wide image.
If you want a ~32" screen, you'll need to project from about 4-5 feet.
The Optoma PK320 (100 lumens, 854x480) is great but expensive ($400+) and the previous model, the PK301 (50 lumens, 854x480) is good, and about $100 cheaper now.
The AAXA P4 (80 lumens, 854x480) is another good option. The fan noise is a little louder than either of the PK's, though.
My personal setup is a Vivetek Qumi Q2 (300 lumens, 1200x800) hooked up to a Roku box, projecting across the room, creating a 90" screen.