When I first read the original post it sounded to me like a general, overall system, type of complaint. Not just a few, specific recordings.
I know I'll probably regret saying this, but the following post from Rok2id does make a lot of sense and is definitely something to consider.
"01-04-13: Rok2id
After reading your post and the responses, I listened to several CDs to see if I could hear anything similiar.
Beethoven Sym #9 1st movement
Bohm and the vienna Phil
Same piece but Karajan and the berliners SACD.
Julia Fischer Bach concertos with ASMF
The Fischer disc was a little fast, but the strings were easy on the ears. no complaints. Of course she was great.
The Bohm was GREAT. Very smooth. No irritation at all.
The Karajan sounded sort of harsh and strident.
Both of the Beethovens were recorded by DG.
The Bach by DECCA.
A lot of CDs are like this with big orchestras. I own a lot of them. Have not listened to them in years, once a I got a better performance and recording. Just a wall of sound that sort of grates on the ears.
I would advise you, as someone said, get a KNOWN well recorded violin heavy piece and listen. If you find it grating on your ears, then maybe you do have a gear peoblem. But remember, if your system will play at least ONE CD with mass violins to your satisfaction, then it will play ALL properly recorded CD the same way. If you modify your system to make BAD cds sound better, what will it make the GOOD cds sound like. Don't say, ' MO Better' :) Beethoven's 5&7 by Carlos Kleiber and the Vienna is considered one of the best classical recordings. Try it.
The Philadelphia Orch with Ormandy was know for it's violin section. But that was on LP. I can't believe I just said that. :) Good Luck."
Also, I really like Frogman's post overall. However, I'm not completely sold on the problem being digital. It could be, but I still think the preamp is the best place to start.
Given how varied the responses are. I think the OP should consider contacting The Cable Company. They have a huge lending library of cables, accessories and components that they send out so you can do an in home demo. I've used them many times and find them to be a great resource.