I had to make the same decision, decided on F6... I wanted dual zone climate and leather, which was a bit easier to find in the FPVs... Bigger brakes, rims... it all sort of added up to a fair bit of extra stuff, all with warranty (which I planned/plan on not turfing, for a little while anyway), for not a huge jump in price. Brakes, overall exterior appearance and the seats and steering wheel are what really swayed me. Not really the extra power that made my decision, and if warranty isn't an issue that takes it out of the playing field almost completely I reckon. Being an FPV gets a bit more cred as well, bit of a wanker thing though hahaha. Personal choice really, I mean it can all be put onto the XR6T, but whether he would want too, or whether that sort of stuff even appeals to him, I dunno. Can't think of any major reason to go one way or the other...