Chavro, I couldn't agree more. I have the late Beethoven Quartets by Quaterto Italiano, one of my favourite recordings. I was trying to look for current releases, more than historical recordings and labels, in my original post.
If you are considering historical labels, then I may be prejudiced being British, but look no further than Decca and HMV. For me the great era of Classical recordings was on the SXL and ASD pressings respectively, of these two great companies, in the late 50's, 60's and 70's. As far as I know, you are deprived of easy access to their output. I am not sure how many recordings reached the US, not as many as here I am sure. You can still find countless thousands of them in second hand record stores here. The sustained high quality of recording and pressing over decades, has never been matched as far as I am concerned. The current favourite choice seems to be Decca, but I have always had a preference for HMV myself.