I know there are threads on this topic, but can't seem to find them. So I got my G5 (doesn't have BT installed) and wanted to add a wireless keyboard and mice combo; Logitech as 2 options: One with BT enabled mouse (MX900) and keyboard for $199 and a cheaper option with USB RF wireless mouse (MX 700) and keyboard for $99. Is there any advantage of the BT combo other than being to add peripherals (PDA, cellphone with BT); I thought i had read that the BT ones were faster / smoother and more responsive. Any input would be appreciated. Thanks. 