Jarraa,
If you already have noise in the system a LOMC would probably serve to exasperate it, not make it easier. The Graham Slee is an excellent phono amp but after reading your post I'm not so sure that is #1 problem right now. Do you have the Speed Box that Project sells? This will give the table near perfect speed stability that will considerably tighten up the sound of all instruments, as well as improve the soundstage.
Send me an email with your return address and/or phone number and we can discuss this further, I have a good amount of experience with this table and can walk you through everything step by step.