Recommendations for rolling tubes on Luxman SQ-N10?

You will hear a more noticeable improvement by changing out the ECC82 (12AU7) and ECC83 (12AX7) tubes than the EL84.

You’ll have a hard time finding someone else with your identical system. Someone with the same amp and tubes will sound completely different to yours. And if you’re using NOS tubes, there is a wide variation between batches of the same tube. All you can do is listen to the tube in your system and make a determination if you like it or not. That’s the maddening part of tube rolling - your mileage will always vary!

For ECC83/12AX7, my favourites are:
Shuguang Custom 12AX7 LS (black bottle)
Mazda Chrome Plate ECC83 (getting pricey now)
Telefunken ECC803S (very hard to find now, v. expensive with lots of fakes out there)

For ECC82/12AU7:
Psvane 12AU7-TII
Amperex BugleBoy 7316
GE Triple Mica Blackplate 5814A
Telefunken ECC802S (same caveat as the 803S’)

Until the Shuguang Customs came along, my regular go-to 12AX7 tubes were either the Psvane 12AX7-TII or Mazda ECC83.

I tried to find Telefunken ECC803S' but I kept receiving counterfeits (or really bad tubes) so I gave up. Reputable dealers (like TubeWorld) are now asking US$1,000 for one tube, which is too spendy for me.

Can’t remember now. It’s been awhile since I’ve had an amp with ECC82 tubes. When I upgraded my speakers to Martin Logan Spires, their 40 W weren’t enough, so I upgraded to SS monoblocks (900 W @ 4 Ohms).

I only run tubes in my linestage preamp (6SN7) and phono stage (12AX7) currently.

In the preamp I have 2 x Shuguang Black Treasure CV181z and 2 x Sylvania 6SN7 GTB Chrome Domes, while in my phono stage I have 2 x Shuguang Custom 12AX7 LS. I keep swapping them out with Mazda tubes. On some recordings, the Shuguang have the edge while on others, the Mazda has a slight edge?

This tube rolling business can lead to madness... ;^)

@thiefofflight

I just realized that I didn't answer your second question.

I find with the Shuguang's that there is more pronounced separation of the instruments and notes. Things like piano notes and a brush on a cymbal have more decay. I can hear finer (subtler) details in the music.

Initially I though the Shuguang's were bright sounding, but what I mistook for brightness was simply the notes having more.... clarity?

I always struggle to describe in words what I hear as the experience of listening to music transcends my limited vocabulary.