you may also want to check out some heavier carbons. The carbons I'm shooting (game tracker terminator hunters) are 12 grains per inch. My finished arrow weight is 541 grains. Im shooting 60 lbs, and at 220 fps, with close to 60 ft lbs. I'd imagine you could get very close to 220 fps with the Nova. Then you'd have enough energy to use a mechanical with a small cutting diameter (NAP Shockwave, RM Snyper, Nail Driver, ETC.). Or you can always just switch to fixed blades or aluminums. Either way, you'll probably spend money on it, so you might as well choose what makes you happiest. Not to sound like I'm advertising, But im in the same boat as you. I went from shooting a PSE with amo speeds around 240 fps with relatively light arrows and wide cutting mech's, to a Hoyt Havoc which is around 225 fps AMO. I wanted to use the same arrows/broadheads, but just didnt have the energy to use them with the current setup, so I went with the heaviest Carbon shaft I could find, and couldnt be happier.

PS, I spine shot a 7 point earlier this year. The head embedded itself into the vertabrae. Pretty cool sovenier.