Todd, i suggest you go searching more for the features and whistles that you are looking for in a receiver.
Out of the names you have provided, Rotel and Denon are excellent performers and apparently have solid track records. NAD seems to have some more mixed reviews but there are some in these forums that use them and love them. The Denon brand produces a variety of receivers in several $$ levels for you to choose from.
Harmon Kardon is also a reputable name although i'm personally running an Onkyo receiver and have had no problems whatsoever.
All of these receivers should sound excellent with the Axiom speakers but only you will know that for sure.
