Id probably change the DV for piece if mind anyway. Its only £50.
Map wise id be looking at Shark performance, APR, P-Torque, jabbasport, superchips, REVO
APR have a really nifty control mechanism where you can change map settings using the cruise control stalk.
Shark performance and bluefin are the only 2 that can 100% revert to the stock map without revisiting the tuners. Revo and APR can switch to their own version of stock map with the same performance as the stock car, but its not the stock map