At a crossroads...what's next

As a neophyte in this hobby, I'm banking on the years of experience this site has to offer. It seems as I bought a new piece of equipment, each one got more expensive. In order of purchase...NHT 2.9 speakers, McCormack DNA-1 DX, ARC Ls-22, EMC-1 CD, Shunyata and Zen cords...Now, what can I expect if I do a upgrade to my amp (under $5k), open to either ss or tube. I was thinking along the lines of Pass Labs ss, or Conrad Johnson tube. Or, since I don't know any better and like the McCormack, would I be better off biamping another DNA-1, and putting some serious money into some speakers... Avalon, Khorus, or Montana for example. Thanks.