Does it HAVE to be bluetooth? I mean, the iPod Touch/iPhone has a great Remote App, but if you don't have a Touch/iPhone ........
What about the IR Apple remote? If it didn't come with your MacBook, you can buy one for like $30 from the Apple Store and it controlls a lot more that just iTunes.
When it really boils down to bluetooth-only, I have yet to find a good one. The problem is the driver sets - I can't find a good BT remote that works flawlessly with OS X. WiFi? Yes! IR? For sure! Bluetooth? .........nope.
Good luck