great cars mate absolutely love mine at cp2 level, Genuinely was pleasantly surprised at just how good these little st180s are when we got ours.

If i were you id hang fire for cp5 to be released as they are saying 340-360bhp with all you have listed above you would have everything in place barring the turbo/and uprated fuel pump.
Im certainly going to look at going cp5 next year if it all the testing goes well etc.

if you buy anything from AET dont forget to enter B7TMY in for 10% discount