I've read somewhere that our tubby little friend did use some advanced harmonies, and in that capacity he was said to have anticipated romanticism. There are some midi recordings at the classical archives:
BBC Radio 3 is broadcasting on Thursday 16 May at 4 pm a programme on The London Piano School in the late 18th and early 19th centuries with comments on and music by Dussek. If you can receive Radio 3 it might be worth listening to the programme which might also feature on the BBC website.
Ah, the London Pianoforte School - Dussek was one of the composers, considered to be a "Georgian Classicist" rather than a romantic pioneer like Cramer and Field were. I only have one actual recorded sonata, the e-flat major (The Farewell), performed by Ian Hobson on the Arabesque Label - volume 1 of 3. it was recorded in the mid-1980's so it may be difficult to obtain. I have had success getting used recordings through the Amazon.com pre-order function. Music of the pianoforte school was edited by Nicolas Temperley of the University of Illinois in a 20-volume set through Garland Press, and is no longer in print. I have had to resort to various library reproductive services to obtain actual music.