I have a few of pairs of 2a3's, Sovtek, Eh gold (came with the kit), and Linlai Elite. I like the sound of the EH gold and Linlai better than the Sovteks. However, the choice between the Linlai and EH Gold is closer. When listening to my digital side it is a wash between the two, maybe a slight edge to the EH Gold. When I listen to vinyl, the EH Gold wins hands down, more detail and better bass. Would not have predicted that EH Gold would beat out the much more expensive Linlai tube, you never know.
Just listened to my UHQR pressing of Supertramp Crime of the Century, sounded incredible!
I think I have some old RCA 2a3 someplace, once I dig them out I'll give them a try