Tube amp question

Sure there are, long as you do not intend to play too loud and your speakers have a friendly impedence curve. Used of course. Assuming both of those are not problems you could probably get by with a 40 to 80 watt job and there are many such on the market. I've used a Sonic's Frontiers SF80 for years - I've seen it on the 'gon for 800 to 1000 from time to time. Good push/pull type which uses EL34's, 6550's, KT88's or KT90's (KT99a's), and to my ears sounds best with KT88's, excellent bass (for tubes), and easy to use. I'm sure there are many others but I've not personally used them. Also, a tad higher than you budget, and with the same caveat about power and without quite the bass impact, the Primaluna Prologue 1 or 2 are quite good as well and even easier to use.

Probably are but one thought comes to mind is dump your preamp and try the Vtl it85 integrated, could be found for 1300 to 1500 used and might fit your budget.

Check out Jolida.

Jeff

I'd second Velo62's answer. Tubes in your pre are generally considered a better way to go if you're going to mix tube and SS amplification (and I'd say go tube all the way and you'll never look back).