hey mate, i just purchased the same rims not long ago, i have stock guards and coilover with the camber tops aswell and corona diff. i went +15 all round with the 15x7 and 205 on the rear and 195 on the front...fits perfect cause i wasn't going for a really filled guard
i also recommend Purnell tyres. awesome crew who know what there talking about when it comes to rims and tyres, i got mine for 1500 flat with delivery and wheel nuts!