despite the general "this has gone too far" discussion, here's my review.
The Fusion is the best razor I have used. I had a Mach 3 Power, and I could tell a VERY noticeable difference with the Fusion. I don't know if it's the improved gliding blades, or the additional 2 blades, but all I know is that the thing really works better.
The 6th trimmer blade on the top/back is really nice. I thought it was dumb, until I found out how esy it was to use it under the nostrils. You can get these pretty cheap with the sale price/rebates.
Plus, my wife gets 20% off anything at CVS, which helps me out too.
Seriously though, I bought it, just to see if it would be any better and it definitely exceeded my expectations.
to be clear though, this razor war may have gone too far. at some point, they'll have to stop. diminishing returns will kick in at some point and additional improvements will be impossible.
also, I'm pretty sure making the razor vibrate is worthless. they used to advertise that it made the beard stand up, but they've sinced changed the ads. I'd heard that this was resultant of litigation by Shick or something, which showed that Gillette was lying about the functionality of vibration in their razors.
funny about the sex toys comment above though. I've thought the same thing. Of course (maybe den of inequity comment here) that you could buy one for v-day, and then use it on your gal two different ways!