I got to thinking that the following might be of some use....
There are two recordings of mine here at my account:
https://app.box.com/s/tvxqkga3qsfsu7uhi2yq
My guitar has a somewhat weird tone, I'm planning to change the pups soon, but anyway.....
The original recording was me just messin' about with amp sims etc, and I recorded four guitar takes and superimposed them all. They all have the same tone. I used the Mercuriall Tomato pre-amp and nothing else other than a tad of verb and very mild delay (until the end of one take).
I just loaded that file into REAPER and added the Emissary amp, clean channel, all the relevant knobs set to the middle.
I go into the PC mic socket using this neat pre-amp by Don Tillman:
http://www.till.com/articles/GuitarPreamp
The FET he uses is getting rarer, but you'll still find it on the web quickly enough. It's an easy build, I didn't use a circuit board but just soldered the components together 'up in the air'.
So, although the recordings I've linked to will not set the world ablaze, they show that I can get a workable tone for almost no money at all
.
Edit:
I have an old Creative Audigy sound card and the Asio4All driver. I set the buffer at 256 usually, but have gone lower. This is all on XP Pro.