Never shot a ST, so can't comment. Shot Muzzy for years, like I said in another thread. Would not rec'd the MX-4 to anyone. Their other heads you will do fine with.

You might want to take a look at the Steeforce Phathead. Tough as heck (thickest blades on the market), and flies fantastic. We have had just phenomenal luck with them so far (turkeys and a bunch of hogs).