Depends what you want doing head wise, the first £300 porting I had done took away all the habit of not wanting to rev out in higher gears, hits 7300/7400 through the gears, as well as boosting much harder and much sooner.
The person I use has only been doing it 54(fifty four) years so think he may have cracked it by now!!
Price wise my piston pocketing is costing £40, some wanted £10-£15 a pocket, so £40 fort all 16 done is good I think!!
tabetha