Tube favorites for Modwright LS100?

My ls100 is harsh and bright but I am still breaking it in. I hope it smooths out

Jimbones, Dan will tell you that it takes a few hundred hours to break-in. I haven't had any concerns about the sound being as you describe and find it very musical. What tubes are you using?

Stock: Tungsol, Shaugang. Yes, Dan did say 200-400 hrs. This unit is not new but a "demo". I have a feeling it was sitting for a while. I only have about 70-90 hrs on it. I guess I thought that since it was used previously it would only take a light break in. OK so I'll have to just get through another 300 hrs or so.

Have 300 hrs on it now. Replaced the stock tubes with rca. Sounds much better

Just put a new set of GE 6sn7GTB tubes in a few days ago. It only took about 30 hours for them to start sounding nice. Initially they sounded thin with no bottom end. They are balanced with good upper end extension and solid bass. Nice tubes for $45.
My LS-100 had a set of Sophia's in it, but they were terribly noisy. Seller said they were good, but somehow before they arrived they got very noisy, one a lot more than the other. Seller packaged them separately and wrapped well. I'll probably try another set in the future after many people said they're excellent tubes.
I just missed the UPS man today who was bringing my set of Shuguang Black Treasures. Will have to wait until Monday for them now. :(