Only tuning companys I have experience of are Turbosystems.. Tony is a really nice fella who never actually tried to sell me anything. He provided me with good sound advice, I had an engine and box for my turbo built after discussing the type of roads I drive on and traffic etc... the engine is strong and still in one peice today as is the gearbox after a good few years of abuse.... I would most certainly reccomend Turbosystems to anyone in that area of willing to travel.
I live just up the road from Power Engineering and as such used them first of all simply because they were very close... however the information I obtained from there was poor and the products provided were not suitable for my requirements even though it was clear from the start that I required guidence at that time..... my experiences were not positive in any way. To the point if my car broke down outside the workshop I would call the AA
oddkiddcreations are going to be doing some bits to my car shortly and Jano seems to be very helpfull and have great knowledge in this area, if your interested in management hes well worth talking to about your needs