"Out of these, Infinitys would be easiest to drive for your receiver (rated 93db efficiency and 8ohm), thou eventually you should consider updating it for newer model with pre-outs."
By that I am assuming you mean the receiver I should update, not buy the speakers and then get new ones? lol.
You seem to be die hard on the infinity's so for your sanity i will be checking them out (hopefully they have them at fry's) as soon as possible.