Watch your spine, but off hand I'd suggest raising the tip weight and dumping the wraps.
I know the wrap option is the less convenient, but if you end up refletching they are toast anyways. They weigh ~10 grains each, so subtracting 10 from the rear and adding 10 to the front should tip you forwards pretty good. This option would keep your speed the same.

Start with the head weight though, it's the easiest to play with.

Off hand I know muzzy makes a 90 grain head and Thunderhead an 85. If you're shooting muzzies you could try a 100 and 115 before jumping into the 125's.

The link Davidmil posted is a great place to play, I go there often

Measuring your FOC is the best way to see what you've got.
The "beatinga dog to death" thread gives good advice on how to do so.

http://www.huntingnet.com/forum/tm.aspx?m=1622831