Expensive vinyl rig - still not performing ;-

Hi Folks:
I purchased a vinyl rig about four months ago comprising a Teres 135 turntable kit, an Origin Live Silver tonearm and a Shelter 501MkII Low Output MC Cartridge. I'm using a Supratek Syrah phono stage section.

I'm confident that each of the componets is very respectable and should work well with each other, but something is not working right - the sound is at a lower par compared to my CD player (YBA CD1a). The soundstage is weaker, less airy, there is some apparent sibilence with vocals, and complex passages tend to be rended in a somewhat muddled fashion. Overall, I'm confident that something is wrong. In the absense of my ability to make comparisons with other components to try and identify the weak point, I'm kind of at a loss. I've tried changing vta, tracking force etc but such tweaking is not the issue really. Overall, I'd be really keen to lend my table to a vinyl nut with some good components to compare it to and so identify what's wrong, or have someone come to my house and maybe determine the issue. I'm having my Shelter repaired/touched up due to another issue, but upon it's return, I'm keen to pursue any suggestions any of you may have. (I'm in Los Altos, Ca, in Silicon Valley). I kind of took the plunge from CD into the vinyl realm with nothing but faith that I would see the light (and it's still dark so far, alas) Thanks in advance for any suggestions you have!!!!