I read a few threads on the Onyx when I was lurking here last week. The store had both. I decided I wanted the gears and front brake more than I wanted the black color. I want to run a shift kit so the derailer will be great. I like the idea of buying the 29 inch MT bike for donor parts. I'll start doing that once I get mine up and running in it's stock form. We have a REALLY well stocked MT Bike shop about 100 yards from my house with a really great MT Bike park nearby as well. TONS of spare bike parts around here!!!!