Wow 2400+ in 8 months! I don't know whether to applaud you or feel badly for you...
I've only been around HF for 4 years, but I was buying audio equipment in the 1970s when I was stationed overseas after college. I haven't taken note of your equipment, as it's meh to me. If you like it, that's cool. If you don't, get something else. Anything you
have doesn't make you anything... but a consumer.
Seriously, you are a culinary student in one of the South's best playgrounds! My Mrs and her best friend have been on vaca in Myrtle Beach and Charleston all week! I really love SC. Just have fun! Turn off the computer and talk with real people in real time! I'm not picking on you, I swear. I tell my students and my two daughters at UGA the same thing on a routine basis (but it's usually geared toward texting). I apologize for the lecture. It's what I do, though, with young people.
Now, you can trade out your EH with anything and it will probably sound better. I almost got one in 09 (I think), but some great folks on this site talked me out of it. Long black plate RCA 12au7s are typically great in the low end. And while we're talking about those tubes, it's not 12ua7s as you have posted. I'm sure you'll get it
correct by post 2500
, and I'm B-U-F-F. A b-l-u-f-f is what lemmings run toward... No bluff here.
Okay, I love Mullards, but I have many, many Heerlen Amperex/Philips tubes. The bass is very clean and tight on them, while the Mullies typically have a silkiness that affects the ends of the spectrum for me (as in roll-off); but they do produce great honey-toned mids. A lot of this has to do with the synergy in the system. Sometimes those cosmic tumblers just line up and sonic magic happens...
But you can't go wrong with a sweet, balanced Amperex A Frame with a dimpled getter from Holland, though. The 6922s are typically smoother than the 6dj8s, but they are way too pricey these days. Enjoy!