exhaust and clutch, any one recommend aftermarket exhaust? and also a clutch question Options

[garin]

my mechanic looked a my car today. i've been have some clutch trouble. he put it up on the lift and saw how bad my exhaust was. oil was everywhere too. he thinks it may be a defective clutch (i'm on my third, burnt one out learning to drive stick, a defective one, and now this one which is screwed up too). the issue with my clutch is that is sometimes doesn't grab. it happens most often in reverse. i don't think it is burnt because there is no smell and it happens only on seldom occasions. any ideas on what this could be?... my exhaust is basically shot. i have a leak and the pipes are starting to erode. any suggestions on a aftermarket exhaust (header, converter, pipes, and muffler, nothing ricy) and the cheapest place to get them