So I recently played in a scenario with my Tiberius T9.1 and it was a blast! I would never have guessed that I would enjoy conserving my shots and reloading after every 8-9 rounds!

So after I got home I started thinking about trading my Stock Outkast for a pump of some sort capable of using 10-12 round tubes. Also I intend on using a HPA tank, maybe with a remote line.
As of right now here's what I'm considering and why:
Empire BT Trracer
Why:
Picatinny rails, I have a few accessories that use the rails
A/C threaded, I have a A/C threaded 10 pc barrel kit that I'd like to use
First Strike capable
Why Not:
Have to buy SA-17 mags
Not sure about efficiency
Don't know how it compares to CCI
CCI Phantom:
Why:
Comes stock with 10-12 rd tube
Looks cool LOL
Lighter(I think)
Why not:
Know nothing about them
Don't know how they compare to Trracer.
Question I have for you all:
Which is better in terms of:
Efficiency?
Accuracy(with stock components)?
Maintainability?
Do they make barrel adapters for the CCI?
Are the pump arms adjustable like Autocockers?
Any and all info on either one of these will be greatly appreciated.