If you ask me, the four proper Sparklehorse albums are all pretty equal in quality, but I'd say the best jumping-off point would be album #2, Good Morning Spider - it's a good distillation of all the different things he does (did, *groan*). The debut Vivadixiesubarinetransmissionplot is a little bit more on the alt-country tip than the others, and albums 3 and 4 get into a lot of crazier production, but Good Morning Spider is a little bit of everything. Vic Chesnutt sings backing vocals on one of the songs, too, if you're in the mood for a suicide duet.