I had a MMF 1.0 with a Benz Mirco MC20 ($250 maybe, I bought it a long time ago) + a multitude of tweaks like DH ceramic cone feet, a ringmat, and a rewire. After about 9 years of ownership I thought I would skip the midlevel upgrade and jump straight to a Michell GyroSE with a SME 309 arm and a $1500 low output MC that was part of the sale (audiogon). What a disappointment. The level of audio improvement was positively not worth the investment. The MMF with the benz cart delivered appx 80% of what the gyro does at 10% the cost. That said, the Gyro is a beauty and a conversation piece and I'm glad I have it. I know if needed I can sell it for what I paid (unlike the MMF)
Anyway, my advice would be to enjoy what you've got, $1000 isn't going to get you much further.
Anyway, my advice would be to enjoy what you've got, $1000 isn't going to get you much further.