I'm running about 240bhp, 15" x 6.5" rims with Yoko AVS tyres, AVO coilovers setup perfect on the front end, strut brace and new standard lower arms and ARB bushes. The car handles excellently but is a bit wayward so I will eventually look into polybushing the front end and changing to fully adjustable TCA's.
15" rims do not make the power hard to transmit - far from it, with teh Quaife diff in the Bernie 'box I've got it's a bloody animal because it really is hard to wheelspin! Quickest fwd car I've been in