what is an ideal tube amp


I have recently purchased a new pair of ClassicAudioLoudspeakers T-3,I believe there efficiency is about 105db/w-m .for my bedroom system.The impedance of the speaker is 16 ohms (varies between 10-20 ohms) I am presently powering them with a Gryphon Antileon Signature biased at 50 watts for class A.The sound is wonderful imaging is perfect in all three dimensions with fantastic clarity and non fatiguing,but very sensitive to sweet spot.I am told by that horn speakers sound best with tube amps,particularly set amps.
I have not had a tube power amp for over 25 years and that was a poor experience.Where I live there are not to much choice of audio dealers who support tube equipment.That means that I may have to purchase an amplifier without the ability to audition it in my system.I need help ,most tube amps I have seen looked at do not have a 16 ohms speakers tap,does that matter??I particular a 10watt amp with only output at 8 ohms I would lose half the power which may not be adequate?I would like to avoid mortgaging the house for cost of the amp,in other words those very unique Japanese amps with a price of $5,000 per watt are out.I do prefer balanced inputs as my Meridian 861V6 has XLR outputs,I use the Sooloos system extensively,however I can also use my Einstein preamp could with all my sources,Zanden transport,DAC or for sacd the Accuphase 800/801 combo.
I would also prefer a trouble free tube amp which does not require constant tuning or tweaking.I listen primarily to classical music.Your counsel will be greatly appreciated.
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Thank you all for the inputs and advise.Specially Atmasphere.I did further discuss the choices with John of ClassicAudio and has settled for a an initial experience with an older version of the Atmasphere S-30.Learn what it takes to live with a tube amp,experiment with it and upgrade it down the road should it be beneficial.As to the efficiency of the T-3 the version I have have the electromagnets for some of the speakers resulting in an efficiency of 100db/w-m,with nominal impedance of 16 ohms and a range across the frequency band of 10-20 ohms.I have learned a great deal from your responses.
Try a Sophia Electric Baby Amplifier which is of first class sound and is very affordable (and liquid in the used market )in your system first. So you know what you would expect for a good tube amplifier. Then you know if you should spend money for single ended 300B or anything else?
Thanks for all you responses.I took the plunge and purchased Atma sphere S-30 which I upgraded to the latest.I also purchased the Atma sphere M-60 monos .Both are fantastic the sound is incredible and like Ralph explained the bass response was far superior to a solid state amp.