I ride the Torch (12 & 8m) love the kite. To give you some idea of my impressions of C-Kites I have owned/tried
From best to worse (IMO):
Easy to boost: P-Series > Vegas 2012 > Vegas 2013 > Torch
Boosting hangtime: P-Series > Vegas 2012 > Vegas 2013 > Torch
Pull during loops (lots of pull is good

): Torch>> Vegas 2013> Veags 2012 = P-Series
Unhooked pop: Torch> Vegas 2013> Veags 2012 = P-Series
Slack after pop: all very similar (specially when wakestyle setting is used)
Build quality: Torch > Vegas > P-Series
Wind range hooked in: P-Series > Torch
Wind range unhooked: Torch > P-Series
If you want to boost and have a easy to fly kite I would go P-Series. If you want to power unhooked tricks probably torch or 2013 Vegas. If you want to do big loops go Torch or Vegas. All of these four kites (and probably also Fuel and C4 will do the Job)