I've never seen the LS version. But I'd be tempted with the 6SL7, it will certainly address the leanness with a bit more overall drama. There are plenty of 6SL7's to choose from too, it's great fun. I'm currently running x2 NOS Brimar brown bases in the line, superb!

It would be great to see a naked pic (ooer!) of the new LS version if anyone has the means.