Tube favorites for Modwright LS100?


Howdy Friends,
Are any of you having success with a little tube rolling for the Modwright LS100 preamp...either the 6SN7's or the 5AR4? And I am sorry, but I am not interested in anything costing dern near as much as the preamp itself...$500 or more for a pair of vintage 6SN7's? Not happening in my monetary (read "happily married") world.
Thanks to one and all for your kind input and experience!
bobup1998
I just received my LS100 installed NOS 1963 Tungsol 6sn7 and a NOS Sylvania GZ34. Down the road I'll try the BTs (have a quad of BT KT88s in my Ayon Spirit and really enjoy them) or the Sophias
I have about 100 hours on the LS100 which I understand requires at least 400 hours of break-in to reach their intended sound. Have liked the sound of the NOS Tungsol and Sylvania as they and the amp have been working themselves in, but decided to go ahead and pick up a pair of the Black Treasure CV181s. Will say that with only about an hour on these tubes they already offer more top to bottom detail than the Tungsol's. Will look forward to trying the Sophia's at some point.
I am auditioning a LS100 with stock tubes.

I find the top end a little hot, bright, slightly harsh.

My reaction may be due to my age and too much rock and roll in my youth, my hearing is down quite a bit at 10,000 hz and higher.

Do you think upgraded tubes for the LS100 will tame the top end or just add bass and expand the sound stage.

Thanks
I purchased the LS100 w/o the ability to audition and went right to using a NOS rectifier and the Black Treasure cv181 based upon prior experience with the latter's KT88s and am very pleased - that said the amp needs about 450 hours or so of break and to my ears continually improved over that period