I wouldn't recommend spending any money on a tweak that couldn't be transferred to another table sometime down the road. In fact, at this point, I wouldn't recommend any money-related tweaking at all (e.g. ringmat, new conterweights, dedicated tt stands, etc). Having said that, investing in a Shure traking force gauge (20$ from audioadvisor.com) and getting a free alignment protractor (http://www.enjoythemusic.com/magazine/equipment/0900/protractor.htm) and then reading up on alignment techniques and then fiddling with alignment may help. Try to isolate your tt from vibrations and movement, but try to do it as cheaply as possible (i.e. a piece of mdf attached to the wall w/ shelving brackets). Spend your money on cleaning the lps you have (perhpas using a homemade cleaning recipe--there's plenty of ideas on the web) and putting them in new sleeves. Add a good, cheap carbon fiber brush like the Audioquest one, and you're good to go. Enjoy!