| Like Ian said - really depends on ££££
PC3 USB & Custom map - circa £570 fitted
PC3 USB & Std Map - circa £320 fitted
FIM chip - FIM no longer trading - so it's an ebay or dsc job - mine for my 748sps cost £120 a few years ago
JHP chip - as Ian said
I've got an FIM chip in my 748sps and it is superb - Motorapido have the software to set it up I think
FIM would be my choice..............if you find one
But I'm sure you'd be happy with JHP & they're on ongoing business!! | 
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