Cable Monkey
A chip on both shoulders...
You have to get the platform right. If you don't have acceptable speed stability and isolation then anything you do down stream will be compromised. Of course "acceptable" is very subjective. Once that is sorted then the arm has to be able to work with the deck. Finally your cartridge has to suit the arm while not objecting to any aspect of the deck such as a ferrous platter or hum from a motor. Thus for me you can't specify best bang for buck in any one component, it is only achieved if all 3 work well together.