Integrated Amp Upgrade-itis hitting....

A lot thoughtful replies on here. I will agree with most that you will need the spend some cash to better that MF. Tubes are different, better at some things, not as good at others, and rubs rolling is a never ending process. Which, while fund, can get into more money than the amp. The Bryson integrated, whichever model you find be, can be fitted with an internal DAC and phono pre. If you want to get serious about vinyl I would recommend a separate phono pre that is adjustable for gain and load. The Emmaline Nighthawk is very nice and adjustable on the fly.

It sounds like you're looking for a "long term" center piece to build a system around. The MF you have now would be sufficient but  3 to 5 thousand will buy you an improvement that you could live with for several years. I don't think you'll see much of an improvement for much less cash.

No one has suggested the Moon neo 250i integrated or higher.... is there something wrong with Simaudio?  I am asking because beernut has transmitted his upgrade-itis...
I have had the Marantz 8400 for more than 5 years now.  It runs almost 24/7, it is dead silent, it has enough power, it is built like a tank, runs cool even when driven moderately loud,  and it sounds relax, laid-back, with some decent detail.  The volume control offers great contol unlike a nad, it adds decibels slowly with precision.  Before the marantz, I have had a nad 316, arcam alpha 8 (bi-amp combo), adcom 5300...
I paired the marantz with psb image t5 for some time; not a good combo at all.. it lacked dynamics and sound was too dark as if you had blankets on them.  I also have had the rega rs5 plugged-in; excellent combination, really really good... lively, clear, transparent midrange... I kept this for 5 years. Next, I have had totem hawks - good combination, but I think it does not bring the best midrange that the hawks are capable of, unless they are not capable of superb midrange.  I also have a pair of wharfedale Denton 80th.  Again, 2 laid-back components, not the best match...sounds a little too dark.
hence, me too... the upgrade-itis..  Moon Neo 250i anyone?

Thanks for the sage advice everyone. Seems I would need to drop some $$ to have a qualitative improvement over the MuFi at this point....Hmmm.

Chrisr - SA is good stuff! I upgraded from separates to the SA 600i....best move ever! The SA soundstage, detail without harshness, is awesome. A true dual mono architecture with high current capability, doubles into a 4 ohm load. Find a dealer and listen! Enjoy the music!

Gabby, thanks for feedback!  How is the volume control?  Solidly built, smooth progression?