Some great advice has already been given - an active preamp or cabling are great ways to inject a little 'caffeine' into your system. For the former, Atma-Sphere and Modwright are tops on my list. For the later, perhaps some nice silver IC's might push you in the right direction - I have replaced cables costing multiples of their price with ClearDay.
Read Al's cautionary note on system gain twice (his posts are always worth reading a few times). He makes a very good point - something I recently had to work through!
Read Al's cautionary note on system gain twice (his posts are always worth reading a few times). He makes a very good point - something I recently had to work through!