How about the weight? How portable is it?

In general, projectors up to about 3kg are easily portable (the average laptop is about 3kg). If you travel a lot with your presentations then try to stick to 3kg or under. If your presentations are more usually to clients visiting your organisation then the weight becomes less of a consideration as you're unlikely to be lugging your entire kit around. Projectors over 8kg are generally best suited for fixed installations.