Replying to Need Advice on Sizes/Styles!

Ok, so here goes: I am going to buy a pair of twins in the next week or so as a second pair to go along w/ my K2 Apache Recon. I am 5'9' and weigh 145lbs. I've been skiing for almost 18 years and consider my ability/style to be advanced/agressive however I am fairly 'new' to the scene of freestyle. I have read a ton on all the skis and am still having a hard time deciding which ski and size range will work. I would prefer something that will work well in the park but also on/off piste. Also, because this will be my 2nd pair and my K2's nearly cleaned out my savings I need price over performance. My K2's are 169 and I regret not getting a 174. Anyway, I know everyone on here knows a ton about all this so help me out if ya can- thanks