I have the Bosch, which is very good - had it for years now with two 1600 tracks. Hasn't let me down yet, and does an *excellent* job breaking down sheets, precise to fractions of a millimetre.
Excellent dust collection with a shop-vac hooked up.
Mafell is even better, but very expensive (if you can find it), Festool is overpriced by all accounts. My friend who has the Festool thinks the Bosch track is better; he was surprised how quickly and
easily I can place the track and get cutting without the need for clamping most of the time. Bosch and Mafell use the same track, b.t.w.
I believe Makita and DeWalt are pretty good also.
I'd stay away from Scheppach and Metabo track saws. The Metabo really isn't a track saw, and the Scheppach has some pretty bad reviews for being sloppy.
I recommend watching some youtube comparison reviews, should highlight different elements.
