Jolida sj502a tube advice

Hello
I just bought a Jolida sj502a tube amp and was wondering what tubes would you recommend and what will they do to the sound of the amp.

Currently has Sovtek 6550we x 4, Jolida 12ax7a x 2 and some 12at7 tube with no writing except the model numbe on the side of the tube.

I like a liquid, warmer laid back sound with really good detail and a solid bottom end. I find some of the tubes are to "detailed" and the mids/upper end is right in my face and that doesn't work for me.

Any suggestions would be helpful. This is my 2nd all tube amp but I am still a newb at the tubes. I will tube roll at some point to try it and see the difference. The one thing I love about this amp is it is very quite and really does sound awsome. I'm just looking to warm her up a bit more.
This is how I'm running it
Jolida JD50a control center into the 502 into Energy Veritas 2.3's through Harmonic Tech Pro-9 speaker cables.
I have an Oppo BD-83SE with the upgraded analog section and Sabre DAC's. I am currently trying different IC's as I have a few different ones and I build custom IC's so I am trying those as well. You definateley get instant feedback when I cahenge my IC's which is what I want anyways.

Thanks again but no $400 tubes except maybe to replace the 4 6550s.

Mark