Hey fellas, I'm looking to retube a Prosonic that I just got a few days ago. I'm looking for some new tubes in the 6L6GC/5881 arena. I'll be using the amp mostly for surf/rockabilly on the clean channel, and thrash metal on the drive channel. It sounds a little dark as it is so some brighter tubes might be in order, but i'm really looking for a more balanced overall tone. The tubes in it now look like some ancient short bottle GTs. Can someone explain the tonal differences between some of the 5881 and 6L6 options? Right now i'm looking at getting the Winged C 6L6GC, or maybe a set of Tung Sol 5881s. I've heard JJs are dark sounding, and the amp is dark as it is, but i havent ruled them out completely. Thanks!