My chain has a link out of it, and my sprocket teeth now look like very small sloping triangles. Does anyone have a suggestion for the best chain and spocket set for the money? I ride in slop alot, and I have sorta a small budget. I just need something to not stretch every ride.. I am well aware of the ironmans, I really wanted the regina o-ring and ironman combo, but is it really worth the 170 bucks?