I have the LT on my MU XL, and am very happy with it - it makes a big difference riding on trails and city streets. I use a Brooks B17 saddle, and a combination of blue and gray elastomers (I weigh about 160lbs).

I ordered it about 2 months ago, directly from http://www.thudbuster.com - was expecting a black post as that was the only option listed on their website; but they sent me a silver one. I wasn't too concerned about the color but I think the silver looks better.

You could give them a call and ask if they have the silver one in stock, it looks like the stock listings on the site may not be 100% accurate.