I would stick with your phantom and get your barrel bored out to accept freak inserts. I have been using my pumps on guys with electros for the last 2 years (and i am creeping through my 30's). You don't play their game and let them get impatient and make mistakes
If you are stuck on getting a new marker with more "fire power", you might want to upgrade to HPA because alot of the gun on the market now require HPA so that they can cycle fast.
The gun I would suggest if you want to still run CO2 is a Tippmann Phenom (i would go with the mech only version). Even just using the mechanical mode the marker is fast and it gets along on CO2 but isn't super consistent.
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