I had a BlackBear Tune on my 03 Silverado 5.3 with a CAI, LT's and ORY and ultra flow muffler, 05+ efans and rest of the truck was stock, for the in person tune i got for 250 i felt it was a good deal and it really woke up the truck and my MPG went up almost 3 if i kept my foot out of it.
Have never heard a bad thing about Nelson, which is why he is doing the tuning on this 96 S10 408/T56 swap truck im building. Nelson got the nod basically because he is local with a good rep.