I want to connect a good tube amp to my PC any ideas?

Hi everyone. I want to get a good tube amp and connect it to my PC. I have the front of Terratec DMX 6fire 24/96 Analog and Digital Multi I/O Device, but no back (the audio card) so do you know where should I start from.

My plan is this:
1) http://www.amazon.co.uk/dp/B00FE9OYZ4?psc=1 GemTune GS-01 Hi-Fi Tube Amplifier
2) Audio card for Terratec DMX 6fire
3) http://www.amazon.co.uk/KabelDirekt-Digital-Stereo-Audio-Cable/dp/B00FQK311O/ref=sr_1_3?s=electronics&ie=UTF8&qid=1441471498&sr=1-3&keywords=RCA+cables
4) http://www.amazon.co.uk/High-Grade-HiFi-Speaker-Cable/dp/B00FBLG6OW/ref=sr_1_1?s=electronics&ie=UTF8&qid=1441471691&sr=1-1&keywords=10mm+cable+hifi

That's my set of speakers for now. https://www.youtube.com/watch?v=LquYoppnOGA Warfdale S500, similar to those in the video.

Do you think that's going to be a good setup? Thank you.

Yeah, that will be an OK setup.

Personally I would go onto ebay and pick up a set of Quad amplifiers and fix them up, but that may or may not be something that strikes your fancy.

There's some kind of irony somewhere having an analog tube amp connected to a digital source. I think something's getting lost there.