For me the jangling sound of the Harpsicord gets in the way of appreciating the music so Scarlatti was an obvious port of call when coupled with the large volume of MID files available.
The steel drums handled the percusive aspects of the music in the right hand well and I took the opportunity to experiment with several different accompaniments - sometimes just in the left hand. The Marimba worked particulary well in the later case but others included Moog synthesized french horn, soft pad and an elf bass. The overall sound is quite different from the Harpsicord original - much cleaner and smoother with evocations of sunny caribbian shores.
There are many more sonatas to work on if these prove popular.