Need a Record Brush. Got a recommendation?

I mentioned the Thunderon brush from www.sleevecity.com before.

After months of using it, I find it a pleasure to use and just as effective as any other brush I've tried. 

I recently came across this: Furutech SK-filter/ www.furutech.com .

It uses Thunderon. According to their site, Thunderon is a group of fine acrylic fiber, chemically bonded with copper sulfide that discharges static into the air.

So the SK- filter works differently in that it's on a stand that allows the fibers to absorb static from above an lp without touching. If it works, is that worth $500.00 US?

I'm happy with my Thunderon brush, it works just as well as any other brush I've tried, but more importantly, it is a breeze to use.

Have any of you shined a light on your lps before and after using you're favorite brush?

Alrighty @slaw, I just ordered my own Thunderon from Sleeve City. It’s listed on Amazon too (where the shipping woulda been free), but is currently unavailable from them. And yes, I have pointed a flashlight at LP's (at night with the room lights off), and it's like an ESL loudspeaker---ruthlessly revealing!

Have I shined a light on my records before and after cleaning.  Yes but not necessarily in the dark.  

It seems that the Furutech SK-filter is no longer being produced.  But it appears to be available from eBay sellers at less than MSRP.