I've owned many of the same items so I can give a few ideas. These are gear I'm using and feel no need to upgrade from:
Zu Denon DL-103R cart- after trying MM carts 2Xmore$$ than the Denon, a quality MC is a big leap ahead.
Edensound Bearpaw Jr. Brass feet- tapped to fit the 3 studs under the MMF 5.1 table for around $100 the improvement is HUGE over the plastic feet.
Monitor Audio GS-20 towers- you'll never look back.
Jolida JD-9a tube phono pre- Stock unit sounds bad but I did the mods myself: Claritycaps, power cable, tubes, opamps & damping + 100hrs burn in = something special.
Hafler 9270 amp- I get what you said yourself: SS character w/ "tube" warmth -plus higher wattage.
Parasound 2100 preamp- clean, neutral, very nice SS MM/MC phono pre built-in, HT bypass, imaging and soundstaging 2nd to none.
Valab (ebay) silver plated OFC interconnects, power & speaker cables.
Have fun!
