Tubes for ARC LS15 Preamp


I've read a lot of comments re: upgrading the tubes that are issued with the LS15. It's time for me to replace mine and was wondering if I should replace with a different brand. Can anyone make a suggestion? I am using a SS ARC 100.2 amp if that makes a difference.
tonyp54

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I have had good results on retubing my SP9 and later my
LS22 with Upscale Audio.(You can visit their website to get phone number.