Hello,
I have "stepped up" a few times the last few years with XLR ICs. Currently I use NBS Statement which are ridiculously expensive but at 20-25% retail cost...when I found them, they were a huge improvement to my system over the already excellent Cardas Golden Cross which I had been using for a couple years. Before the Cardas, I used SilverAudio Silver Bullet 6 cables and these were an outstanding value. I see these on the used market here in the $100 range. Check out www.silveraudio.com. The owner, Max, is a very nice guy.
One thing I have learned is that some links in the system are very critical to cable changes and other links can be very subtle until a certain component comes a long and makes cable differences very dramatic. The line stage to amp has been for me the most sensitive link so I have tried many many brands here to find out what worked well with my ARC, and BAT and Counterpoint gear along the way. The phono stage to line stage really made very little difference in cable changes. For the longest time with an ARC PH2 to LS5, I tried so many cables here and the differences were very hard to hear if they existed at all. Only when I put in an Aesthetix Io and then wow, the NBS magic came through. But until then, believe it or not, a $50 Belden XLR cable was mighty fine for this link. It may sound strange to have multiple thousand $$ cable in one link of the system and then $50 elsewhere, but for me, it worked well at that time.
Incidentally, I do not use these Beldens anymore and so if you'd like me to send these to you .... for free, let me know. I also have a pair of the SilverBullet 6's around here some place that I could ship to you to try if you'd like.
As for some of the sites mentioned above, fatwyre, etc., nothing against these businesses, but you can get a far better value through so many private audiogon members. Try these out at the great used prices and if they do not fit, sell them off again. Just browse through IC cables here and there are plenty to keep you busy reading and researching. You really do need to try several to find one that fits best with your components. And what you seek is very different than the rest of us.
John