How did you manage to bulk up with 50-60lbs of fat? With 7-10yrs experience I don't know how you could've screwed your diet up so much
(ripping done :P)
Keep in mind that you still need carbs even when cutting, they provide alot of energy. As long as you monitor your fat and carb intake and keep protein high you should be alright, just don't drop carbs down to like 20grams a day...IMO that's a bad move unless your shooting for some sort of carb depletion or carb cycling diets.
What is your current routine? Its hard to make changes when I have no clue what your current routine is...
I would also suggest looking into HIIT training for cardio. I put together a training program using HIIT for a friend and he's lost 20lbs this month (which to me is a very manageable level of fat loss).