Unusual to see no comments for the semi-major guys by now, it's 2010, dudes ;_:
Anyway, he wrote tons, but it is all quite good. I'm swamped by the quartets and quintets so can't pass judgements, but the symphonies are right up there with Ries and similar.
Perhaps the best finds are the large-scale chamber music (sextet, septet, nonet - sadly no octet? :c) and the nonet in particular just kicks arse.