Check out the Primaluna stuff too! I have the Primaluna Prologue Two. Its not an SET amp, but it drives a much wider variety of speakers with its 40wpc rating. Works with KT88s, KT90s, 6550s, or EL34s. I love the sound with the NOS tubes I have substituted for the small signal tubes it came with. Less than $1,550.00 also!!!