Diving into the world of tubes...help needed!

FYI: PrimaLuna: i was thinking of buying one of their integrated amps and called them because my speakers have sensitivity of only 83db. A person answered the phone and they were very friendly and helpful.

@berner99 Glad to hear.  One thing that really draws me to the PrimaLuna is the bad tube indicators.  I still think I'll go with the Vincent in the end though.  The only way I can audition a PrimaLuna is to buy one and then if I don't like it a 5% restocking fee would be charged.

Take a look at Rogue, had Primaluna Dialogue HP iintegrated and their straight non HP integrated. Sold them and bought a Rogue HP-1 Pre and a Atlas Magnum I sent both of them to Nick at Rogue, had the amp upgraded to a Magnum II and the Pre they checked out thoroughly, gave it a bill of good health and frankly, I think the sound is superior.
Additionally Rogue does it all in the US and I found their customer service to be unmatched! Actually spectacular more covers it!

For a tube set-up I recommend separates vs integrated as some have suggested. Mcintosh amps drive the tubes easily and auto bias, so you gain longevity and the engineering is not as subject to tube rolling as much. That said, I found getting a tube pre-amp first and hook it up to a solid state pre-amp. You'd be surprised at the results. Also, tone controls are cool and useful. Get them. One last note that tube amps are heavy because of their output transformers especially as more watts are added. Depending on your space tube amps need their own space or rack because you can't stack the components due to their unorthodox shape. Good luck with your search. Tubes are cool. 

Look into the coincident technology amps — the Frankenstein MK 2 monoblocks are exceptional. If you are only running one source, look into a passive pre. they’re simpler, and simpler almost always sounds better. Cheaper than a decked out active pre.. Placette makes an excellent one.

Separates will sound better if you’ve picked the rest of your system carefully. Synergy is all. iwhat you hear from whatever you decide to buy will also depend on your cables and isolation and room acoustics and other components. There’s a reason they are called stereo SYSTEMs.