How can I improve my system

I have cobbled together quite a nice system over the years and have heard quite a few far more expensive systems that did not sound as good to my ears as what I have. However, I recently walked into a showroom and their setup blew mine out of the water, despite not being "ultra high-end". So now I'm wondering where I should upgrade to take my setup to the next level. The showroom system was all (expensive) Krell (10K pre, 10K power, 12K source), yet modest 10K Thiel speakers. I have source: heavily modified Denon 3910 + upgraded Audio Note 1.1 DAC, McCormack MAP1 pre (used mostly in "surround" mode). Odessey Stratos Mono Extreme Power and Silverline Audio LaFolia speakers. Misc. high quality cabling. I think my weakest link may be the Silverlines or the McCormack. I always liked the Revel Studios so this could be an options. Modding the MAP1 is also an options. Any suggestions are welcome.