Electronic is always gonna be the best, you cant fault the Greddy profec b spec II, very easy to set up and does exactly what it says on the tin, £220-£250.
You can always go a bit more technical with something like the Blitz SBC iD, which i had in my old 200sx, pretty much the best unit you can buy, so many different settings to really get the best from your car boost wise, bit more at around £320 and upwards, but its very smart.

Mike