Lovastatin < Simvastatin < Atorvastatin <Rosuvastatin
The cheapest simplest drug is lovastatin, but the potency is the least. Rosuvastatin is most expensive available, proven beyond doubt to cause minimal liver damage or muscle ache.
Muscle ache is the commonest adverse effect of a statin. It IS NOT muscle weakness or joint ache.
Statin is known to damage the liver in some individuals not tolerating it. Do a 6monthly or anual liver function test, specifically for ALT and AST.
Having said that, you shouldn't have taken up statin if you do not have other cardiovascular risks. Therapeutic lifestyle modifiying should do the trick. Eat less oily and fatty stuff, do more exercise.
Atorvastatin New from Doctor for high Cholesterol, Cholesterol