I decided not to buy a g15 logitech keyboard largely because i felt the my current (described above) logitech keyboard is pretty ordinary and not as nice to type on as my microsoft multimeida keyboard. Instead I got Razer Lycosa gaming keyboard which seems to have favourable response from reviews for typing. Do the higher-end logitech keyboards feel much different (they sure look the same)?How would I feel about typing on the lycosa if I like the Microsoft media keyboard?
The better Logitech keyboards with the thinner keys are a lot better for typing, but I'm not a huge fan of wireless keyboards for the whole batteries thing. Anyways, if you want a nice keyboard, try the Saitek Eclipse. I've been using this keyboard for a very long time (the original Eclipse, there's a newer version now) and it's very durable, easy to clean, and the keys feel nice when touch-typing. Not as nice as the IBM Model M keyboards with the clicky buckling-spring keys, but still nice.
