Monitor Audio Speakers with Denon Amp ADVICE NEEDED PLEASE

I am new to the forum, having said that however I have been dealing with and listing to Hi quality equipment since the early 70's. I immigrated in 94 and up until this year have not really been able to afford hi end equipment. I have used the likes of Sonab 116's, Meridian M10's (Still the best sounding speaker I have ever heard at any price) and Thiels to mention just a few. I recently purchased the following and would appreciate some feed back from those more knowledgable than myself. Denon AVR 1911, Monitor Audio RX1 Fronts , Ma RX Center, MA Vectors Rear and the Paradigm DSP 3400 V2 sub. Music source is the Creek Evolution CD Player. Any and all comments positive or negative would be welcomed. Room Size is 5mtr x 4 mtrs although no 2 walls are parrallel. I have read that the MA's should not be partnered with bright velectronics. How does the Denon add up. BTW I have the option of returning all or any of the components if I dont like them. I have 90 days to decide
Cheers