advice from someone who knows

[shifty4.6]

I was just wondering if anybody knows what a reasonable price for getting my heads ported, throwing in new cams and oversive valves would cost. Im looking around for price estimations and im getting large range of numbers from $3000-$5500 with the install. Also if anybody lives in the sountern california area and has any good mechanics they recommend im all for a little help here. Im looking at getting good power gains. So i didnt know if getting a $2500 job would be crap???????? Or is it nice and they just arent taking me on the install. I would love to hear some feedback or even advice on what cams, custom grind or not or what type of port i should go with. I have a 2002 gt so i cant get trick flows which is what i wanted. Im looking at staying naturally aspirated too.... thanks