Nordost and Siltech in one same system could be an interesting exercise. Don't have experience with Nordost. I also thought of Crystal cable. In my mind that would be similar to the SIltech + SR I tired before. Very very detailed and fast but maybe a bit to thin? But just guessing. As said do not have experience on either one of those, and maybe could be fantastic.
Personally I think for Crystal Cable the lowest one to start with is the Standard Diamond, the Piccolo and Micro to my mind loses a bit too much and are a bit like you say thin or another description subtly "bleached" although still incredibly good with fast high energy transients such as drums.
Even the Standard Diamond I think suffers a bit of this but does a lot of other things so right.
One consideration with the interconnects on Crystal Cable, the Crystal Bridge Diamond that seems to work well with the lower range and Standard, although its cost might as well possibly just upgrade from Standard to Reference that works out only a few hundred more from what I remember (never thought of trying bridge on that).
SO if have a very good system and looking at the high end cables, would consider Reference and higher from Crystal Cable.
I have the Crystal Standard Diamond but listened to model each side - may try the bridge interconnect vs Reference again in future out of curiosity, if a 2nd hand/ex demo Reference comes up for sale.
Also own a few other manufacturer cables, but never tried Siltech so very curious on the comparison between them and say Crystal Cable Reference and higher models, or even Standard with Bridge.
Cheers
Orb