The options seem endless, and without listening to all are there specifics about each brand that might help me at least rule some out?
You hit the nail on the head, there are several brands that present great value for money and in all but the most drastic cases, without listening to them, it will be difficult to recommend one brand over the other.
Numbers are a place to start, but, how you place/ use the speakers has a much greater impact on sound quality. Things like, leaving room for rear ports, toe-in, acoustic treatments, electronic equalization to counter room effects, etc.
Regards specifications, look for the following,
Frequency response = Flatter is better, look for +/- 3dB ratings
Sensitivity = Higher is better, anything >=88 dB
Impedance rating = 6-8ohms, makes it easier to drive without a dedicated amp
Try to keep the Mains and Center limited to brand and series to ensure timber matching. This helps get smooth transition in multichannel audio material.
I am very happy with my Axioms, but then again, everyone on the forum is happy with their selection.
