Asking again: Recommended small projector?

[AES]

Anyone willing to offer informed recommendations for specific current
models of a modest-price "personal" LCD or DLP projector, for projecting
primarily slides and PowerPoint presentations directly from a MacBook,
in conference room type settings?

[The problem is, there are so many models, I don't know where to start.)

Price range? Say $500, maybe up to $700.

Small enough to be "tote-able" in its own case; doesn't have to go into
a briefcase.

As noted, to be used mostly for PDF slides, simple animations, an
occasional video or live web page; but not a home theater quality unit
or for use in gaming (in fact, sound or built-in speakers not essential).

Old-fashion 4/3 ratio will be fine. At least VGA resolution, but SVGA,
XGA, WXGA preferable.

Emphasis on reliability, medium brightness, not too horrible fan noise.

I gather the new pico-projectors are not yet ready for prime time --
unless the most recent versions have gotten a lot better?