i'd just like to say that a properly-built aluminum frame is not any more "unsuited" for "tricks" than steel. i've ridden numerous trials frames, all made of aluminum, as well as some mountain bike frames. i'm not saying there isn't something a little flawed with the design of the PK Ripper, but being Alum isn't it.
if i wanted to do tricks, i would get the 29" Big Ripper. if i wanted to just ride around, the PK Ripper should do fine.