Never Owned a Tube Amp and Want Advice

Which leads me to question, how large is the OP's listening room? 

Listening room is 25 X 15 X 9.  Due to room logistics, speakers are two feet from the front wall and the speakers are about 10 feet from listening position; thus half the room is behind the listening position. 

I suggest reading Robert Harley’s book "The Complete Guide to High End Audio", paying particular attention to the chapters on amplification.

Good reminder to take another look at it. Thanks!

Selecting tubes and tube amps to suit your needs is very subjective, plus there are a bunch of variables that are unique to each situation. Pick a well regarded amp circuit as a starting point, and get your feet wet...you can taylor the types and brands from there as needed.

I’m running two Dyna/VTA ST70s in a vertical passive bi-amp configuration, which allows me to use different tubes on the woofer channels than those on the tweeter channels. They’re all EL34s, but there are differences between brands, and it’s fun to experiment with them. My stock driver tubes are 12AU7, but I recently opted for 12BH7s in the more critical positions...I love those.

My amps have a manual bias that’s really fairly easy to do, and once set, they don’t drift much. No worries if you can use a voltmeter.

I’m driving speakers of average 89db efficiency. I can run the amps in triode mode at 20wpc, or ultralinear at 35wpc. The vast majority of the times I opt for the clarity of triode mode, and almost never feel the need for more power or more volume. There’s so much room ambience, inner detail, and dynamic contrasts that I don’t feel the need to reach ear bleed levels anymore ....100db is more than enough to annoy my wife! Love the tubes, and will likely never give them up because of the glimpse into the studio that they offer. Good luck!

The speakers in question are Tyler Acoustics. Tyler advised me they are 8 ohm 88 dbl and should not dip below 6 ohms.

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In terms of impedance this speaker is an easy load (which is good regardless of what kind of amp you have, but with tubes this is particularly helpful). The only issue is whether 50-60 watts is enough power. What are you playing them with now?

Even if you don't have the opportunity to audition a wide array of amplifiers in your home, you should at least make the effort to hear one or two with your speakers to get some idea of whether tubes are really for you.  I've heard Tylers (don't know the model) with some medium and lower powered tube amps, and I thought they played well together, but, that is by my standards, taste and listening practice (I don't listen at high volume levels). Only you can decide how loud the amps must play, how much bass and bass control you demand, how important is the ability to play softly and still sound reasonably balanced and exciting (tubes are generally good in that regard), and a host of other considerations.

For my particular taste, I am not a big fan of high-powered tube amps; if something requires more than 50 watts, I am inclined to look at solid state even though most solid state amps sound slightly lifeless to me, particularly at lower volume levels.  I generally find higher powered tube amps to sound brittle and a little bit harsh.

If you don't demand ultra deep and punchy bass and rock concert volume levels, I think you could find a tube amp that would make you happy, assuming, that is, that the Tyler speakers are a reasonably easy load to drive.  I've heard many speakers with a lower efficiency rating than 88 db/w that worked well with 50 watts or less.