Affordable is subjective. If one considers this item as an investment that will last for years (and these do last for a long time), it's considered as affordable. Like many high priced ticket items, if you don't have the money for it right away, just save up for it. I say based on what the MPC can do (as well as the SPD-S), I think that it's affordable, and will pay for itself in the long run. That, in my opinion, is an affordable investment. With that said, I'll cast my vote for the MPC 1000 (or 2500 -I'm upping the ante with that one).
Based on your LGM track record, anything above $10.00 is expensive (i.e., new drumheads, etc.).

And, I won't even put up how much my Shure E5s cost - that'll probably send you cowering under your bed.

Drumming is an expensive profession/hobby. It's inevitable.