Between your three choices, and your associated equipment JM labs might be first/best choice. Theils are nice, but a bit difficult to drive and the Quad especially difficult (as unsound pointed out). If dynamic range is a priority and/or maybe deeper bass then I would be even more inclined to take JM labs instead of Theil. This is assuming used prices too. For $1,100 to $1,300 new I think JM labs is the only choice (and a better balance for your gear).
