What do you think of gear drives ?

If you wish to be different then go with the gear drive. They are pretty cool IMO. I have used both the Milodon and cheap CAT system with success. For a street ride it will last forever. Interestingly the CAT system was relatively quiet while the Milodon was VERY noticeable but not offensive. Get a really good harmonic balancer, think ATI here if you are worried about harmonics. Go Milodon if cost is no issue.

For a completely different direction consider a stock style link-belt chain and a timing chain tensioner if you want cheap and reliable. J.Rob