ace inhibitors should lower ck levels if anything, regardless, they do block angiotensin which constrict the arterial system allowing more volume for fluid thereby lowering overall systemic pressure.
Betablockers block adrenaline, that is the "beta" that it blocks. Adrenaline turns the key to many systems in the body, they are located in the intestines, heart, lungs, brain etc... Many primary care doctors put people on betablockers, it has minimal benefit on blood pressure compared to others such as ACE inhibitors or ARBs. Statdoc is correct in starting with a simple diuretic.
I would reserve betablockers for rhythm control or following a heart attack, not blood pressures. The side effects in most people outweigh the minimal benefit of blood pressure control. As with all medications, some do not get side effects, but often people do have side effects from being over betablocked and it is often insidious, they think they are just getting old. But they slowly go downhill with lack of exercise and malaise. Often this resolves itself after betablockers are removed. It is something that should be considered on any patient who complains of fatigue and who also is on betablockers.
Again, you may not fall into that category with side effects, but given that there are better blood pressure medications out there with fewer side effects, there is not much reason to prescribe such a weak bp agent.
A physician should be able to tailor fit a bp therapy as there are a vast array of medications to achieve ideal blood pressure control. It is up to the patient to be aggressive in controlling it and also working with their physician to get it under control.
Betablockers may not interfere with your cardio, but that may be the dosage you are taking. I guarantee if you are over betablocked with a high dose, you wont get your heart rate, that is why its prescribed for MI patients to prevent blood pressure surges from tearing open friable layer of arterial plaques causing rupture. That is the desired effect to help prevent heart attack. You are just not at a very high dose if you can get your heart rate up with cardio. Sometimes a tiny bit of betablocker can actually improve cardiac performance by allowing more cardiac reserve for people whose heart rate zooms up to maximum in a minute or two.
Point being, it has its place, but its not an effective bp med compared to several others out there