Muzz,
Don't knock the Rockets......they are extremely effective if you match the style head to your set-up and game you intend to hunt.

I have taken a BUNCH of deer with Rockets and they have been impressive. I typically shoot high end KE set-ups so I lean toward the larger cut stuff.......Sidewinders,Slammerheads,Miniblasters. They give me the combination of a large cutting diameter with terrific penetration.

With you set-up I would stay away from anything over 1.5" diameter in a typical lever open style head.
Probably the best Rocket suited for your set-up is the 100gr. Steelhead. Great penetration and a proven reliable head.
Glad to see Rocket is addressing the sharpness knocks too........I hope they also address the problems that they have had with threads/inserts. My newest packs of Slammerheads are nice and sharp.

I have used the NAP Scorpion and that might be a good choice for you. Very sharp, opens quickly and solid.

One thing to consider.......if you are going to shoot a mechanical head of the same cutting diameter as your current heads and you are having no issues? What's the point?

The reason I choose to shoot mechanical heads for deer is simply because I typically have KE to spare. I like overkill and want to put that energy to good use, bigger cuts, more tissue damage.
If you feel that you might be on the light side for mechs you might just want to stay with what you trust. You definitely don't want to be looking out at the end of your arrow shaft wondering at the moment of truth.