i'm still in the planning/savings mode to get the iMac. is the bt keyboard/mouse worth the upgrade? what is the battery life and reliability of these wireless devices? i don't like wires as much as the next person, but is going wireless worth the $50-$60? i could see it if i were to have a mini and wanted to surf the net from the couch, but it being a desktop system... also, what is the weight of the wired vs the wireless? all they had at the local mac reseller was the wireless, and i must say the added weight of the mighty mouse was quite nice compared to my current roller ball mouse.