Upgrading the Source.

I've slowly built a two channel system from the time I was 16. First starting with a simple Yamaha/psb combo till now...some 10years later to a SimAudio Moon i-5080, Polk Audio LSi 9 speakers and NAD 541i CDP. The Moon was the last upgrade and thus the NAD 541i, even only a year old, is the weakest link. I've come to the conclusion that small upgrades will cost me more down the road.

I'm an avid reader of UHF magazine and I relate to the importance of source first. What I need is some opinions on possible upgrades. Arcam, Musical Fidelity, Naim, NAD silver, Rotel, Shanling, Linn the list seems endless.

What I can tell you is that I could see myself one day, getting that final Intergrated amp like the SimAudio i-5. Possibly 3 years from now, no earlier then 2. The CDP I need should come up to the standards of the associated gear I'm using now, and also allow for further growth with speakers. I DO however feel this will be my last CD player, untill a higher res formatt like SACD takes off. Perhaps the Shanling S200 with the Chris Johnson upgrade?

I even wonder if higher priced players then the one I have now like the Rotel 1070 are even worth the bother. Again, I'm very happy with the Polk Audio LSi 9 speakers (some of the most underrated speakers on the market, and rightly so from a big market speaker company) I want the jump UP to count. Please help steer me into a narrower path.