Double check the specs on your particular model of Maggie's. Last I recall seeing, some models dipped to 2ohms and you may need an amp that explicitly states that it is stable into 2ohm loads. I'm not sure in your case so double check so that you don't have unforeseen issues.
You will likely not find any receiver that handles a load like that. When I was looking into Maggie's several years ago, I was told by my dealer that my Marantz 80wpc receiver could handle it but it wouldn't be great. However everything I read indicated that receivers were not good to use and go separates. Specific models that I know of off hand that may work well are Bryston, Lexicon, and Proceed. If an Emotiva amp will carry the load then that may be your best bet in your budget for both the power amp and the preamp. So I suggest that you start with www.emotiva.com as your first starting point.
You will likely not find any receiver that handles a load like that. When I was looking into Maggie's several years ago, I was told by my dealer that my Marantz 80wpc receiver could handle it but it wouldn't be great. However everything I read indicated that receivers were not good to use and go separates. Specific models that I know of off hand that may work well are Bryston, Lexicon, and Proceed. If an Emotiva amp will carry the load then that may be your best bet in your budget for both the power amp and the preamp. So I suggest that you start with www.emotiva.com as your first starting point.