I bought a CS4 a couple weeks ago to replace a Nomad 2 that lasted me a few years. It's so much faster and so much quieter than the Nomad. I'm a fan now. May buy a CS3 for backup.
I bought a used .25 Nova few months ago. It's a hammer, and an accurate one at that. Mine is shooting around 46 ft/lbs. It's got a slow leak I need to get to, but I think it's a great gun.