That's a great combo, and you got a great price - especially on those D5's. Good call on the Nova's extra watts - the D5 doesn't need the extra power for a small room, but it certainly takes advantage of it - especially for movie watching without a sub.
Get a USB cable to hook up the laptop to the Nova, and you're set gear-wise. Time to listen to things, and to play around with no-cost tweaks. It's a good enough combo that you'll clearly hear the difference between compressed and uncompressed music. If you have a CD collection in storage, now's the time to think about re-ripping everything as FLAC/ALAC. And depending on how lound you listen, try plugging the Nova directly into the wall rather than into a computer-oriented surge protector - you may find it makes a notable difference in sound quality.
Also, be willing to play around with the D5's placement in the room. They can boom a bit if you put them right up against the wall, but since you're playing everything from a laptop you can probably mitigate it with a software EQ curve. Also don't be afraid to try pulling them out into the room (on stands, for example) to see how the sound changes, and experiment with the grilles on and off.
Finally, make sure you have a comfy chair in the speakers' sweet spot, because everything sounds better from a comfy chair!