how much should I spend to get a better turntable than my current turntable?

Although there are plenty of used turntable and no doubt many of them would be a valid contender here I would stay away from recommending one due to the fact that there is no way to know their condition.

I don't know if you can stretch your budget to the Rega P2, if you can I think you will find its of a different quality specially its Arm which will see you through several cartridge upgrades. I personally think that's an important consideration since in this hobby we typically upgrade the cartridge until we reach the point where the Arm and table can no longer support the upgrade.

In the case of P2 you will probably need to spend $2000+ to significantly better its arm and structure.

Hope this helps narrow down the search!

@mgolpoor 

yes, this is helpful. I don't know if I should spend more on the turntable than on the rest (2500 is what I spent on the amp and speakers) as it may be diminishing returns then?

I am checking out the Rega P2! 

I figured out the answer: a better turntable than what I have now is an mmf-2.2 THAT WORKS

haha

The most simple-minded response to your simple question is to advise you to buy the next higher level model in the MMF line.  It's bound to be "better".

@lewm sounds logical, if I still had faith in the brand