Tried tubes and LOVED it, now what?


Hi all, I had Solid state all my life until I bought a used integrated tubes amp Cayin a88-T for $1,000 and love it to death, but after few years, now what? I’m Thinking of movng up the chain but not sure where to go. Most of my speakers are bookshelf and small floorstandings. Thanks
nasaman
As usual a thoughtful and informative post from trelja. I have to agree with him in particular regarding Jadis (really good quality output transformers)  amplifiers. They are wonderful sounding music reproducing instruments. AirTight is no doubt a fine choice as well.

If keeping the current amplifier you can begin with upgrading to high quality coupling capacitors such as Duelund CAST or Jupiter copper foil. This level of capacitors do make a difference.
Charles
nasaman I forgot about what is involved in biasing that amp...Start rolling with the small signal tubes,they do not affect bias voltage...
@freediver I will have to look up to understand what does rolling tubes mean. I heard about it but I was outside the “circle” so i kinda block it out. 
I will put Air Tight ATM-1 on my wish list. Someone posted it on YouTube of it mating with black bookshelf B&W and they sound outstanding. On the other hand, May I ask how’s Jadis’s liability and repair cost? Thanks all
Second the idea of upgrading parts. MIT Multicap RTX are made of tin and styrene, a very neutral combination. Solen makes a good tin and teflon cap, if you are after a bit of brightness. So does Relcap. Nude Vishay resistors are also worth their weight in audio gold.