Water injection!!!

[Foxcolt]

Welp, I'm pretty hell bent on kit a water/alcohol injection kit, before I've having trouble finding a kit of quality.

Apparently aquamist makes the best kits but I'd like to spend no more than 300 on a kit. Those go for 500+

So far I've looked at liquid cool..looks decent and spearco.

Any others?
I met a guy with a 12 second MR2 that swears by the spearco but I'm a little weary of the fact that it uses vaccum pressure to provide the power to shoot out the water.

Any tips insight would be great.

PS. I dont' want to hear about water injection in it of itself. I wanna hear about different kits If you don't know what it does then do some research, don't post here!

Thanks,
Jed