Never had any experience with Musical Fidelity but I'm sure that Dyna 3.3 worth to be kept when you will wish to upgrade components. From the specs I see you've no problem with power. Great matches could be for your future reference: Bryston 4b-st or sst, McCormack DNA1 or DNA2, VTL MB125 or VTL MB180.
Your spending might've been less if you ask here earlier but you did your job and research already so far and I'd keep it for the next upgrade.
If you will feel that your system is not powerfull enough than near-field listening will be more appropriate in your case. Dynaudios have a very high and clean performance that is very suitable at near-field and low-volume listening so the main demand is from amplifier, preamp to be stable and clean to deliver pleasant near-field drive not neccessary with high power.
I personally evaluate components at near-field rather than in some dedicated large room to hear every imperfection slowly changing volume level up or down defining ranges of distortion-free listening the larger range I will find the better I will love the product or system.
