Newbie wants tube recommendations

I have always had some form of a stereo since I was a kid. About 5 years ago I started a home theater system with an Onkyo HT receiver and some Polk book shelf speakers. I then bought some Axiom speakers. I then got a Parasound HT amp. The Parasound amp is rated at 220w at 8 ohms and 300w at 4 ohms. I am still using the Onkyo as a pre/pro.

Well about 2 weeks ago, I bought a pair of Legacy Audio Classics. The classics sound way better than the Axioms ever could. Now I kind of have the bug for trying some tubes. Never have and just wanted to see if I like the sound. I am looking for recommendations for something that doesn't break the bank, but gives me a feel for tubes. Any suggestions?