I use the D-Skins and love them. Now that we can download the full game to our harddrive the dvd drive doesn't have to access the disc as much anymore. I know you are going to say,"weel I have 50 games and I cant download them all to my harddrive" What I do is just download the games that I play the most. Also It wouldn't hurt to gt a 120gig hdd from ebay or fry's or whereever you shop then just "hack" it to use on the xbox 360. Thats what I did....
I can fit 38 games on my 250gb jtagged 360, total cost of the hard drive plus shell $60
But yeah, if you don't want to scratch your discs just put the console sideways and put the game(s) you play the most on the hard drive. I wouldn't bother with those pads from llama, but just be careful.
If you keep your console vertical it is more prone to scratching and it's also more prone to crack the center of the disc. Same things happen when you carry your xbox from it's place when it's off when there's still a disc inside, this is how my second halo 3 disc cracked, because I always carried my console on the train in my backpack weekly with the disc inside for months and months haha. The first one was cracked by the case it came in as it had a metal spindle.