From the Trans Atlantic Series, Not sure why the Royal Atlantic is part of it as it is not an EL84 based amp but if you search for the RA it is included in the Trans Atlantic series.
Demo of the Grid slammer used the RA100 on the Lo gain channel. One of my favorite amps (actually have two of them).
http://www.bing.com/videos/search?q=mesa+grid+slammer&&view=detail&mid=BD0FD145A7DBBEAE108BBD0FD145A7DBBEAE108B&FORM=VRDGAR
Archived in the Mesa website: Royal Atlantic
http://mesaboogie.com/amplifiers/electric/transatlantic-series/royal-atlantic-ra-100/index.html#videos
Transatlantic series on Mesa Website:
http://mesaboogie.com/amplifiers/electric/transatlantic-series/transatlantic-ta-30/index.html#videos
Stiletto Series: I had bought a used Stiletto Deuce stage 1, played it for about one week. Traded it in for an RA100 Combo. Compared the Deuce to the RA100 Head, RA100 was much better in my opinion. However, the ACE really sounds good and probably would have like that over the Deuce. No video's on Mesa site. I am sure there are plenty on the ACE, Deuce, or Trident on youtube.
http://mesaboogie.com/support/out-of-production/stiletto-series.html
There is one video on the Electra Dyne.
http://mesaboogie.com/support/out-of-production/electra-dyne.html