The people clinging on to MCSEs are starting to die down a bit, and the MCITP is on its way up. If you go with the Server one, it's 3 exams you can head towards, and then you can add a couple more to bump it to the Enterprise one.
The good thing about the server one is that it's got the networking side of things in there (albeit to a far simpler degree than any Cisco/Juniper/Brocade/Whatever certification), so it'll give you an idea of how that side works a lot better.
Honestly though, if you wanna work on the networking side I'd put some time into the CCNA too if you can. If nothing else, it'll stop you being one of them guys that goes "but it's the network
" just because they don't understand it.
In terms of reading material, you aren't gonna go too far wrong with the Microsoft Press stuff (I borrowed the 2003 ones off a friend, and they are actually fairly well written). Actual courses I don't know, I've always been a self-study kind of guy.
If I was you, I'd try and put some time into Linux as well. Someone who knows Networking, Linux and MS servers is going to be worth their weight in gold anywhere. I was taken on at my current job partly because of my networking knowledge, but also because Linux isn't "that thing beardy guys use" to me.