I'm looking to get a pair of twin tips. Never had a pair before...I just started doing a lot of park skiing and I love it, but I can't even do a 180 on my downhill skis. I want something quality but don't want to spend too much on anything. My size would be somewhere in the 170's, and the skis would have to be good for Pennsylvania skiing as this is where I go 80% of the time. Tips would be greatly appreciated. Thanks!