I hate the stock 727 with the 007Mk1 but it's a better fit with 009. I don't think this was intentional though as the decisions taken during the design process have two very different roots. With the 009 Stax are back on a usual path with a new magic diaphragm film supposed to make everything better.
Agreed but the LCD-2 R1 isn't nearly as transparent as the current production LCD-3 when both are driven by a very good amp and source. The R2 is a little better than the R1 IMO. The LCD-3 is capable of sounding great in a well matched system and IMO competitive with the SR-009. I have the 3 Audeze headphones mentioned here and the SR-009. My LCD-3 was repaired just a few weeks ago and is representative of the current production level. The 009 has the edge in transparency and detail retrieval but the difference is slight. The LCD-3 has more bass presence than the 009 in my system (again not by a lot but it is noticeable) and that gives it an edge if your taste prefers that sound signature. I like having both the ortho and the electrostatic systems at my disposal depending on the recording and my mood. My dynamic and electrostatic systems are both very enjoyable and the differences are there but definitely not a far cry apart.
Upgrade that A-10 to a Stax SRM-323 and report back is pretty much all I can say. Might also get a good dynamic amp while you are at it.