I prefer Launcher Pro as my home launcher replacement, but to each their own.
As far as upgrades - are you considering rooting or do want want to stick with stock?
Welcome. I came from an eNV2 to a Droid. Couldn't be happier.
My tip: Read through the boards. There are a lot of tips and ideas here. There's a nice Application board with idas for various applications, that's how I found a lot of mine. Plus the Screenshots of peoples Droid desktops? discussion, others would ask what the app or widget was and they would reply (that's how I found out what a widget was).