This week we recieved 3 new pisten bully 600's. one winch and 2 freegroomers. I got the chance to demo these for a night during our demo times last year and they are the most comfortable cat out there. They, in lack of a better term, kick ass.
For the parks we use all pisten bully with the occasional bombi here and there but the bombis generally stay on the freegroom side of things. I personally like the pass a pb makes more than the bombis. It looks better.