I've decided to forgo my allegiance with IE7. It is good and well featured, but increasingly seems to freeze and sometimes crash on my Vista installation.
I use Firefox at work, which is great especially the password manager and the Add-ons that are available. But aesthetically, I've never preferred it.
So, for the moment I've decided to move to Google Chrome. It is very fast and has good separation between browser windows (one crashes the whole lot doesn't). It also has a nice clean interface, and I like the integrated address and search bar.
The only thing it does lack is an RSS reader. I prefer a downloadable on rather than a desktop interface, so for the moment I am using FeedReader, which is similarly clean of interface and very straight forward.
Then again, when IE8 comes along, perhaps I'll have to look again...