Zetia probably does not work for everyone, but it may be worth a shot if statins aren't working. There are the bile acid sequestrants as well. Our prof seemed to be a proponent of those. The down side is the GI issues.
Not sure how effective Co-Q is at preventing the statin-induced myopathy, but, again, with your doctor's or pharmacist's consent, it seems worth a try if the alternative is abandoning statins altogether. It can have some pro-coagulant effects so be careful if you are on warfarin. Of course, if you are on warfarin you know you have to watch out for a lot of things.