Haha, I'm certainly not on the higher end of things here at home, Soundave. I think there's a place for all levels of gear.. half the deal these days is transporting projects around all over the place.
For instance on the latest album im doing, we started drums off in one of the best studios in the state. Now we're DIing the guitar into my mbox2-mini, which we will ultimately reamp at another great facility, where I study.
It's all about knowing what you can expect from various environments and how to make it as cost effective for yourself as possible. But yeah I suppose I'm preaching to the choir here, as you'd already know this.
@Don: I seriously think your most convenient option is to go out and buy a Digidesign Mbox2-Mini. You get the recording interface, with a mic preamp, headphone out, and even DI capability. It comes with ProTools LE software... and not only that, but it's bundled with a ton of free plug-ins, AND an instructional DVD on how to use ProTools. Pretty damn convenient.
The Mbox will also work with other DAWs... so if you decide you don't like ProTools, you can always grab Sonar or Nuendo or something (whether through underhanded means, or actually purchase them).
I think rather than using the valvestate, you would probably get a better tone using amp modellers. I have an 80w valvestate sitting right next to me... it hasn't been turned on in 2 years, and is used as a clothes hanger.
With vocals, it greatly depends what sort of voice you have, and what style you're doing. As Dave suggested, an SM57 may get you by given that you don't know much about sound recording, and likely wouldn't really appreciate the difference between a budget condenser microphone and a rugged dynamic like the SM57. The great thing about the 57 is that it's damned cheap, and if you ever wanted to mic up the valvestate with it, it'd be more than apt for the job.