Title says it... here's the issue:

Replaced my brakes all around back in late April - new rotors and pads in front, new pads in back. All worked well EXCEPT after the switch I noticed that my front right is dragging. Not bad, but just enough to hear it rubbing and the car pulls slightly to the right on the highway. Not sure if this started with the brake job or not, but I hadn't noticed it before.

Here's what I've done:
1) Replace the rubber brake hose. Thought I'd start with the easiest first.
2) Replaced the entire caliper assembly.
3) Gone over it 6 different times. Tried different rotors and pads, as well as combinations of parts of the caliper.

NOTHING seems to fix this. Took to my local mechanic (NOT a Benz guy, but we don't have anyone that is in my podunk town) and he looked it over and drove it and seems to think its an alignment issue. Personally, I'm thinking master cylinder (because I've replaced everything else).

Thoughts? Should I take it to them and allow them to do the alignment or would I be wasting $30-40 that I don't need to spend when I'll end up replacing the master cylinder anyway? Thanks!