Thoughts On Turntable Clamps And Weights

I have a Pro-Ject X2B and am curious about turntable weights and clamps. I perused the web and discovered that, like so many audio related items, prices range from modest to stratospheric. What are your thoughts on clamps and weights? Do they provide a notable improvement in sound quality? Does price equal quality? What should be avoided?

Thanks,

John Cotner

New Ulm, MN