Why would you buy both the touch and the classic? It just doesn't sound practical to me. The touch is thinner, but it's otherwise the same size/larger than the classic. I can see getting a shuffle or a nano if you really needed something smaller to carry now and then, but even then I couldn't see myself spending the money on more than one iPod. Correct me if I'm reading you wrong, but here's an idea: consider saving the money, or, even better, give it to charity if you really have so much of it that you can't figure out what to do with it! Personally, I hate having little 'trophies' lying around if they're things that I don't use regularly.
Considering that you already have the older iPods, I would think the decision would come down to whether you want the space of the classic, or the novelty of the touch. The new nanos are really fun and a lot like their larger classic counterparts, so if you asked me I'd say get the touch and the nano.
