k2s- heavy, durable, decent ski.  not too playful, but there arent many k2s that are...
suspects- light, poppy, playful, enjoyable, but will fall apart within a month.  ive seen like 15 threads about kids saying their suspects/dumonts ripped edges out after like 2 weeks of moderate riding.
overall, id say the suspects would be more fun for a short period of time.  if you have the cash, go suspects and be prepared to buy a new ski for next year.  otherwise, go k2 and ride them out for a loong time.