[dcentric]

how much money do you want to pay for an additional 20hp? if you upgrade you'll surely be in the lurch for at least 30K, which comes out to about 1.5K per bhp. If that were my money i'd be more likely to go out and buy a BMW 135 or a used 335 for the difference and have another little rocket to poot around in rather than spend the money on something with negligible difference.