Hi all. I want to put a front disc brake on my mtn bike (no rear tabs). It is a ~2000 Litespeed Ocoee with a 2007 Fox Float RLC32 80mm (fork has both v-brake bosses and disc tabs). My V-brakes aren't cutting it in the crazy forests here in NC coupled with my current mass (all muscle of course ) of 100kg (220lbs). I'd like to spend no more than $200-250 for the front brake since I need a new wheel to go with it too (feel free to give opinions on that as well). I ride mainly xc type riding with some all mountain type thrown in periodically. Can I go bigger than 160mm? At my weight I'd assume I'd want to, but are there any limitations set by my fork? Anyway thanks for the advice and education. FWIW I have brake boosters on the current XTR V-brakes too...

-Meek