What amps have you heard to make you think you want warm and lush? Maybe mention those amps to give people a point of reference. I ran CJ Pr.12xs (triode amps w/el34’s) for quite a while. They were probably the warmest and lushest amps CJ made at the time. I still use tubes but no longer prefer that older CJ sound when compared with what they offer today. If you truly are looking for warm and lush I recommend you look for a pair of CJ Premier 8’s. They come up on the used market occasionally and will be exactly what you are looking for. Plus they will give you the power atmasphere says you need. I hope you have good A/C though because they will put out some heat.
But going back to warm and lush, make sure that’s what you really want. Many people think it’s what they want until they get it. I mean who wouldn’t want warm and fuzzy😎. Personally with your speakers (which I lust for btw) I don’t think warm and lush is really what you should be looking for.