I've worked on the SPR, and it is the easiest by far to get into and get out of. Upgraded EVERYTHING, right down to the solid metal bearing spring guide. Should last you a LONG while without problems, unless you do something silly like use it as a support weapon.
Performs VERY well, tends to outrange other 400fps AEGs easily. Rugged, heavy, with a 9.6V 3300mAh battery it has an awesome rate of fire, funny it only has an EG 700 in it!!!
I say go for it, put a kick ass scope on it.