Rear projection technologies including DLP, LCD, and LCoS are all excellent in dimmer rooms and those that don't get a lot of direct light. But, when the light levels go up, it is tough to beat plasma and lcd flat panel displays. The problem with plasmas is that they tend to have a glossy glass screen that reflects window light like crazy. The plus side with plasma, is that in a flat panel display it tends to have one of the best overall images possible.
The winner, in my opinion, for your setup would have to be the LCD flat panel displays. While a bit on the pricey side, they are incredibly bright and the newest models have phenomenal image accuracy and off-axis viewing capacity. This combined with a non-glare screen provides excellent overall image quality in bright rooms, especially those with larger windows and direct sunlight in the room.