this guy is pretty good. tune seems better than pcmforless but ive had problems with mine from him so im sending back. i dont think its the tune, i think its the chip. gotta get around to it. have the pcm tune in it now.
http://www.lt1pcmtuning.com/service/

 

i think im just going to stick with pcmforless. price usually inidicates quality and you said you had an issue already. i just want to plug it in and have it pretty close to what i need.