I have an older Spire and later got a Rotor 2. I found the Rotor to be much more reliable. No experience with the Spire III, though.
If you have an x-valve, then you have a Level 10 bolt. To find out for sure, air up your mag, stick a finger or tongue in the breech, and pull the trigger.
Or you could just identify it visually.
(Superbolt II = Level 10 bolt)
If you want a nice tank, Ninja is 2nd to none. If I'm not mistaken, they offer the lightest tanks available and have the fastest, most consistent recharge.
The Proto Rize does indeed have eyes, and it seems to be universally regarded as the best entry level electro currently on the market. For $250, nothing else comes close. That being said, I'm very much a pump and mech guy and have never shot a Rize in my life, so take this for what it's worth.