There are several great tuners. Agostino Racing Engines is one of the best, CARTEk is great, MTI....so many. The key is...who is doing the install and tuning for you? You can have the best product in the world and with proper install and tuning your will be a disaster.
I'm an ARE guy myself and think they are the best. They have done considerable work on my car and it has always been top notch.
A good tuner will know what you need to fit your needs. You have to go with maybe a more mild cam if streetable is an issue. Most great tuners though can make anything streetable IMO. Hell they build HUGE strokers with 500+++++++rwhp and they are streetable