Just an update from this beginner...

Well, I must not be at the level of needing that extra boost/ sag from tube amps yet. To be honest, I don't hear or feel any difference between the Epi Valve Jr. and the use of me little Crate PowerBlock. In fact, I still favor the power block over it... just seem to get more feeling? out of the crate.

That being said... for $99 its still a great little head.. feel of quality for the money and sounds good... nothing special.. but good.
I have yet to mess with the tubes.. but having to run it thru speakers all the time (which I do really love the cab I got), with no other option to the computer (line-out/in) makes me default back to the crate.

I just mention this as something us new guys have to get use to. A home player using a tube amp while sitting by his computer kinda lacks options that a SS amp or multi-effects box offers... with little boost to our playing sound if any for going with a cheaper tube amp.