If it's within your budget buy both a Silver Ref and a Matrix and keep the one you like. Ultimately you'll have to try both in your system to know which works best. If you buy used here on A'gon, you won't loose anything if you need to resell. Both the Silver Ref and the Matrix hold their used value very well. Good luck.
2 Acoustic Zen Silver Reference II IC's too much?
I had Acoustic Zen Silver Reference II XLR IC between my McIntosh 301 and McIntosh 6900 with great results (well, maybe I would prefer a slightly softer sound). Now 6900 is gone and it's upgraded to 402 power amp. Most likely it will be paired with C46. C46 has a rather "warm sounding" repuation so I'm thinking about getting another Silver Reference. Or maybe it will be way too bright and I need a Matrix Reference IC?