EDIT: If you're looking at overhauling the transmission, my 2p worth is stick with the genuine Honda rollers, as the other weights I'd tried weren't much cop. Soichiro always knows best
The Honda Bando belts are expensive, and I had one snap after 6000 miles (was supposed to last 12000). Fool me once etc. - these days I buy the Taiwanese ones off eBay at about 1/4 of the price, and I replace them every 6000 miles whether they look OK or not. None of these has ever given any bother.