I agree with Stringreen. there is nothing in your system that can be improved for $400 new retail that meets your parameters for an auto table. And if the Denon runs fast,nothing else will matter until you replace it.
I would get a DD turntable from the late 70 like a Sony PS-X60 which is automatic and built like a tank. You should be able to find one on the auction sites for less than $300 and if not, I have one. then get a decent phono preamp like a Cambridge 540p or 640p if you want to use a MC cartridge. Those two changes will make a marked improvement in your sound, and you can then save for better speakers later. Otherwise just wait until you can afford everything better.
I would get a DD turntable from the late 70 like a Sony PS-X60 which is automatic and built like a tank. You should be able to find one on the auction sites for less than $300 and if not, I have one. then get a decent phono preamp like a Cambridge 540p or 640p if you want to use a MC cartridge. Those two changes will make a marked improvement in your sound, and you can then save for better speakers later. Otherwise just wait until you can afford everything better.