Originally Posted by cyccommute

Or you could get three Trail Rats (one for you head and two for the handlebars), extra batteries to convert to a 12 V system, 20W 12V bulbs, helment mount and still have enough left over for about half of a good hardtail.

All kidding aside, depending on what you want to do, getting 2 or 3 Niterider Trail Rats, which are good economical lights, would be a good place to start. Much better light than the Cateye. And you might just continue to be married when you're done