I'm with AlexH on this one. I love playing old games on my A2000, and have been having a ton of fun with it. But I have a PS3 and a Wii, and I wouldn't give either of them up to keep the old games...
The Wii is a fantastic console, with some great games. In my house I've got a SNES, a Genesis (Megadrive to those not in the states), a Dreamcast, a Wii, and a PS3. The Wii is the only one my girlfriend ever plays. I'd say of the 'this-gen' consoles, my time is split about 50/50 between the PS3 and the Wii.