Who To Remap an Audi A4 2.5Tdi V6 Quatto

i'm at a complete stop here now, as i have never had experiance of Remapping a car
i've mailed a few companies and they all giving various prices and final BHP figures all over the place
these are the results and i'll admit that i'm thinking of going to REMAP WIZARD, purely for cost and distance reasons.

REMAP WIZARD have Quoted 193BHP @ a cost of £189
AMD Quoted "around 200BHP" @ a cost of £339
REVO "don't do apparently"
CELTIC TUNING Quoted 190BHP @ a cost of £300 (i think)
TUNIT Quoted 180BHP @ a cost of £398 :O
EVOLUTION CHIPS Quoted 180BHP @ a cost of £359
and there was another company who rolling road the car before and after the remap, for about £350... any idea's who :S :S

any idea's on what to go for or any other companies i may have missed out on, i'm located in BANGOR North Wales.
Many Thanks,
Wayne

cheers boyo, i'll mail them in the morning

i'll have a looksie now, where are they based... can you also report back too pls anf give the figures after the "tweek".