have rode impulse, alpine, mcx, and powderlites. Impulse and alpine respond the best, impulse's new stand alone fuel system sounds real cool. A true turn key and ride, you dont set anything or make any maps, just like a car it sets itself.
The front mounts definately have a little better throttle response. Once you are moving though you really cant feel much lag in the rear mounts. Add timing control with Power commander and it is really close. If you run no headshim the rear mount have almost zero lag. Impulse definately has some new stuff to the market. Alpine is almost in your back yard, close and easy to get service.
I have a rear mount PL Stage II kit, which I thought has awesome response and zero lag until I tried the new Impulse pump gas w/ standalone fuel system...Paul has this system dialed! It responds like my '08 XP did:d
I've had both. I now run rear mount. Although
there is slight lag in the rear mount, I prefer it. my front mount went up in flame cause of all the front heat. it was installed my Alpine motor sports. never again