I recently, stupidly, managed to loose my Quest. I thought about the alternatives, and two sprang up. The Nuvi 550, and the eTrex Legend HCX. The Nuvi was about £250 and the eTrex I found at £150. Despite cooler features on the Nuvi, I only opted for what I really needed and the eTrex fitted the bill. It can do everything the Quest did, with a Micro SD slot as well.
Have a look here:
Another decent outlet is here:
So far very pleased with the little eTrex.
Adventure: it's an experience, not a style!
(so ride what you like, but ride it somewhere new!)