100mg and above. This is the most expensive of the 3, IMO.

And it would be best to do 300mg a day for conventional CoQ-10, but cost may stop you.

CoQ-10 is not absorbed well, so pick one with enhanced absorption. This may be two types. Since you take other drugs I'd avoid the one with Bioperine in it. This may interfere with your other drugs.

The other enhanced type has a solubilizer added to enhance absorption.

If you opt for this one, you can get by with lower doses.
http://www.epic4health.com/noname.html

Here are some dosing recommendations: for Qgel
http://www.epic4health.com/dosnotqgelco.html

There is a new form of CoQ-10 called ubinquinol. This tends to be more expensive, and one can use less therefore.
http://www.epic4health.com/ubiquinolcoq10.html

Basically since you do not have serious disease elsewhere, you may not need really high doses. People with heart failure need high doses however.

This is the premier supplement for people using statin drugs.