Thinking of a new motor

Hey guys,
My CA M15A4 has been upgraded with an M120 spring, and there's a noticeable decrease in ROF and semi auto trigger response. What I'm looking for is a motor that will help in these areas, without going way overboard such as with a systema magnum. I have seen videos of the guarder infinite torque up motor, and it looked pretty nice, but I haven't heard any other opinions of it.
I'm not looking for a big ROF increase at all, maybe just to get it back to where it was at when stock. (Understanding that power versus ROF is really a trade one for the other). What I'm really looking for is just better trigger response, again without shredding up internals as with the magnum or any high powered motor.

I am also planning on getting a new 10.8v battery, once I can get the funds. My 9.6v is falling apart and I need to get a replacement soon anyhow.

won't a 10.8 battery shred your gears?

I'm not sure ,but this looks like it might work. http://www.airsoftgi.com/product_info.php?cPath=31_50&products_id=135 And wont you need to do more modifications if your using a 10.8 volt battery and an upgraded motor and spring?

I vote G&P M120 motor all the way.
You SHOULD be fine with a 10.8v, just watch your wiring. Everything should take it fine, just keep to semi or controlled bursts. No hosing, as that'll kill pretty much everything in the gearbox pretty quickly.

Shoot, Killbucket shot 5000 rounds through a JG M4 with a 12v battery and no mods. Non stop. Without even releasing the trigger. It lasted all 5000 rounds, then pretty much dissolved, lol... If he kept to firing bursts, it would have lasted just fine. And that's a JG gearbox mind you.
Shows you that if you know how to shoot, you should be fine with pretty much any battery.

Only thing I plan on changing out soon (in the gearbox) is the piston. I still haven't changed out the stock yellow piston (doh!) but otherwise, I don't see that I'd have to change out anything else.

I guess I'll have to try out that G&P motor then.
-Bert.

^ Also consider the EG1000, while not as fast as the M120 by G&P, the EG1000 is a hybrid motor, so you will also see a larger reduction in trigger response with the EG1000, over the G&P M120, regardless, I have seen the M120 in action, and it is a very high performing motor, any choice would be good.

Have you also thought of a 12C lipo? Firefox sells them in a stick format and in a crane style. I have one in my AEG, and it is excellent, best of all, these LiPos have a lower discharge rate than most lipos, thus your gun can take these without modification. You would need a balance charger though.