+1 on the bundle and on the Cakewalk store. I'm really finding a lot of very useful sounding presets in this bundle. I almost passed on it, because it's not something I really need, but I'm glad I picked it up.
I have a few of the other sets mentioned above, and while they do have some good sounds, they seem to have a lot of "Gee, look what I can make this synth do" type of sounds. That type of thing sound cool on its own, but never works into a song very well.
As far as the Cakewalk store goes, I never had a problem in the past, but this time around I ordered Saturday and got links that didn't work, so I emailed them. Never heard back, but I kept checking back and trying again. Finally last night (Tuesday) I was able to download the files. Wish I had thought to go directly to DSF instead.