Good Value
I've bought a Mac Book Pro in the last 6 months. Best machine I've ever bought. Works very well. Runs Win XP (using VirtualBox). I'm sure it would run Win 7, but who cares. I develop web solutions for a living and it works just fine.
As to the new mouse, if it works as well as the MBP touch pad then it will be a winner. Multi-touch is amazing.
As to price, you can argue about that all day. While you're doing that I'll be enjoying myself in Mac land. There's not a massive difference in cost at the end of the day (and remember OS/X needs less resources than Windooooze).