I'll back up Scott's review. I just recently received a 200-20 after having a Badger 150 for a few years and a 100LG for the past year.
I find the 200-20 nearly foolproof to use and the ability to "dial" in the line thickness consistantly is a bonus.
The teflon washer does tend to get flattened over time, but that's also a problem with the 100/150 line since the head and needle tip are the same one. The 200NH has a different head assembly that eliminates the washer, and that's the ones Scott is refering to.
The 200-20 has the "detail" spray regulator instead of the crown regulator on the 100/150.
I think you'll be pleased with your new acquisition!