Salvator is a serious beer - that German dark stuff has some serious knockout power.
A scotch ale to try if you can find it is Founder's Dirty B@stard. They also make one aged in oak barrels called Backwoods B@stard that is FANTASTIC. Incredibly strong as well - I think it weighs in at 11%. It's almost like drinking a mild scotch/bourbon - heavy vanilla flavor and smooth mouthfeel.
So, a funny strong beer story - I was in Newcastle England for my birthday last year - my buddy and I are out at a local bar. We had been drinking most of the day, and we stumble into a bar. This was during their ale festival, and we were sampling all kinds of cask ales, but all were in the 4-5% ABV range. We order the strongest thing on the menu (at a paltry 8%) and the barmaid says "You realize that's a strong beer, right?" - my buddy looks at her dead pan and says "that's kind of the point."