You know what, I have a CopterX450, Trex450 Sport, and a Trex600ESP, and nearly every time i go flying I take my CopterX450. It all comes down to cost of the repairs. I put some good servo's on it (HS65MG's) that'll stand some impact so they dont get damaged, and they never have. To be honest, for my level of flying, if I put the GP750 gyro on it as well then I cant tell that much difference between that and the sport. OK the sport has more power with the 400M motor v scorpion 2221-8 but she rolls and repairs are cheap so I'm more confident and that’s good enough for me. The others are just there for a few circles and for show

If am reading you right and budget is important then grab a CopterX 450 from
[link]http://www.ehirobo.com/shop/product_info.php?cPath=334_174&products_id=9062[/link]