A "monitor" is a speaker that does not impart any tonal changes to the signal, aka accurate sound. By adding a "warm" receiver, you will have negated the accuracy of the Paradigm Monitor. The only way to do this right, is pair the monitor with an accurate receiver and (as mentioned by 3db) control the room's effect on sound.
Any big brand/mass market receiver (like, Denon, Yamaha, Marantz, Onkyo) in the $1000 range will fit the accuracy criteria. Look for the product that meets your processing and power needs.