Personally, not a big fan of PCMR, don't know why. Just has a really fake vibe for me. Canyons, on the hand, I love. This will be my 4th season with a pass there. It has a few flats, but the resort is so massive, you only really hit them on your way to the better runs. Personally, I'd suggest going there one time during your two day Park City stay.
Also, Snowbird and Brighton are a lot of fun as well, those two + Canyons are my three favorite resorts in Utah. Sadly, I haven't had the chance to ride Powder Mountain yet.
No matter what, your going to have a blast out here!