Battery Life, here are my tips:
For all apps (gmail, twitter, google reader): Change their update time to once an hour, or more. If it's constantly checking to make sure there are updates, it's constantly using more power than required. And for all these apps make sure they're not downloading images. I had a google reader app that burned through my battery by downloading images and updating all the time. Turned that off and that fixed my issue.
Close any apps you're not using, you'll take a hit in loading time but you'll save some power as well.
The other thing that makes a difference is the coverage you have. When I stay in places with low coverage, it uses more power. Where I am at the moment it's full 3g, and it can last 2 days easy with the amount of browsing I do. Which isn't heaps.
I also don't play games or use it as a music, they'll both use lots of power.
And lastly, I have it plugged in at all times at work to make sure I never run out of power
As for the PC Suite, that's how it is designed to work. A bit of a pain, but something you get used to.
Enjoy your new phone!