The folks at Naive answered a few prayers when they concurrently reissued the Vegh Quartet's Beethoven and the Quatuor Mosaiques' Haydn back in late 2013. Both reissues come with all the original documentation and excellent packaging. Collectors of string quartets should obtain both sets as soon as possible at these reduced prices.
Made in the early 70s, with Sandor Vegh, Sandor Zoldy, Georges Janzer, and Paul Szabo comprising the ensemble, these recordings came just after the same foursome recorded a classic set of Bartok quartets, and I don't think a better combination of Beethoven and Hungarian quartet playing exists in good stereo sound.
"The Veghs" especially excel with the earlier quartets and slower movements - fine variations in tempo and tone, like an intimate conversation, give these readings an extra degree of recerche that makes many rivals sound overwrought. This may be heard as a fault by some listeners, but for me it reveals these quartets as possibly the greatest music ever composed.
The sound on this set is warm, soft and woolly in a good way, with less glare than many later quartet recordings, and I find this fits with the quality of musicianship. The discs come in two standard four-pack jewel cases, all in one cardboard box along with the complete booklet.
While others will have their own favorites, this is the set of string quartets I'd take anywhere with me if I could only have one.