Tubes for a Shanling CDT-100

I purchased a new Shanling CDT-100 about 7 years ago, used it for about 6 months then moved. It has been in storage ever since, I will be buying a house soon and looking forward to setting up my equipment. I never liked the sound of the original tubes and am hoping some of you Audiophiles can recommend what you think would sound better then the originals.
For readers that do not know, the player comes with 4 6N3 tubes; 2 for the headphone amp and 2 for the CD player.

I replaced the 2 stock 6N3s for the player side with Western Electric 396As.

Clearly better than the stock tubes.