I think it really depends on what sound you are after. I have owned the ARC 26 and a Cary SLP-98 (have listened to the 05 but never lived with one).
The ARC is definetly more analytical and less "tube-like" than the Carys. The 98 is more of a classic tube sound with lots of bloom and warmth. The 05 would fall in the middle of the three. The Carys offer bigger soundstages in my experience.
Both are very well made and have nice features and I doubt you would be disappointed with either. Obviously you like the Cary house sound so that may help the decision... however as some have mentioned it may be too much of a good thing.
I think what you hear with the 17 would be a great indicator of what you will hear with the 26 so I would give it a try and see how you like it. If you like it, you will like the 26 even more.
Hope it helps a little...
The ARC is definetly more analytical and less "tube-like" than the Carys. The 98 is more of a classic tube sound with lots of bloom and warmth. The 05 would fall in the middle of the three. The Carys offer bigger soundstages in my experience.
Both are very well made and have nice features and I doubt you would be disappointed with either. Obviously you like the Cary house sound so that may help the decision... however as some have mentioned it may be too much of a good thing.
I think what you hear with the 17 would be a great indicator of what you will hear with the 26 so I would give it a try and see how you like it. If you like it, you will like the 26 even more.
Hope it helps a little...