How serious are you?
I guess they are fine if you just want to screw around in the basement, but if I was serious I wouldn't look at anything that wasn't compressed air. Those springers, while they can be very accurate, are much more hold sensitive than the PCP.
Here's a good thread about that very rifle:
http://targettalk.org/viewtopic.php?p=51399I wouldn't pay over $350 for
any springer, unless the sights cost more than that and I wanted them for some other gun.