recommend 6L6 tubes for preamp

I just recently completed a Moreplay preamplifier kit from Bottlehead.  It came with some russian 6L6 tubes.  Not sure what the brand is because it's in Russian (maybe Sovtek).  Anyway, wondering if folks had any recommendations for a NOS tube?  It's sounding really nice right now but I think I could go with a little less bass bloom.  I'm a fan of the tube sound but I like it to be subtle rather than in your face.  Should I stick with the Russian tubes or look for something else?

thanks!