beethoven string quartets

I've only been listening to these quartets for @ 3 years now and they've become some of my favorite music.. If anyone could make a recommendation of their favorite COMPLETE set of LVB string quartets and why, I'd sure appreciate it. I currently have a mixed bag: Cleveland 1-3, Petersen 4, Quatur Mosaiques 5&6, Emerson (middle), Cleveland (late). I just ordered Takacs to replace the Emerson. I've tried to get into the Emersons and can't get there. I'd like to also have a complete set by one quartet and there's a lot to chose from. I'd prefer to go DDD, but have no problem with ADD if very well recorded. thanx for any and all suggestions!