Hey thanks for all the info guys! :)
I love the player, haven't had a chance to do any tube rolling. I was planning on doing some comparisons between the Sovtek LPS tubes and the stock tubes, but since for whatever reason my player didn't have the typical stock tubes I am just sorta stuck with only knowing one sound :)
I'll look into some 5751's, they tend to be pretty pricey if I recall. Between this player, my ONIX Ref 3's, ONIX A-120 MkII, and CinePro line conditioner I'm a bit low on funds, and the Sovtek's seemed to have the concensus as being the best tube sound for the money with this player, or at least in the threads I came across.
I'm really loving this thing though. It's very revealing, but I never find myself whincing in pain while listening to even my most horribly mastered albums, and the bass is very clean and tight, which I didn't expect coming from a tube component.
Cheers!
-Nathan