Was at Apple store...a few differences between ver 4 and 5 I can't figure out...

I was at the apple store and was playing with the parallels 4 they had on their machines. I noticed two really nice features my ver 5 demo is very different from.

First, the resolution on ver 4 changed on the XP desktop with the resizing of the MAC window. This made for a really crisp picture no matter what size the parallels window was re-sized to. The ver 5 parallels does not do this. Resizing the MAC window does not change the XP desktop resolution and once you resize smaller then native resolution it looks terrible on the screen. Why does 4 have this nice feature and 5 doesn't?

Second, the mouse in ver 4 would seamlessly move back and forth between the parallels XP window and the MAC desktop. But in ver 5 I have to click in the XP window then try something like command+tab to get the mouse back to the MAC desktop. Why again does ver 4 do this so much better then 5?

Can I still buy the ver 4 instead of 5. Sure seems better to me.

Thanks.