I weigh 120-125 and am 5'2". I rented a 140 and a 138 I think. What would be recommended and are there any great used gear forums or is buying new more advised? Again, I come from a windsurfing perspective where buying used gear is the norm.
I'd definitely look into used. Geartrade is great, but I got my first stuff at play it again sports. There's probably a used sporting goods store near you (or theres always CL). Size wise is weight, riding style, and type of board dependent. Height is irrelevant. Sounds like they have ya in the ballpark though.
Riding this season...
2015 The Rat
2007 The Experience