Thanks for the response. Good point regarding the type of music. Let's say pretty significant bass content. Think Porter Robinson, if you're familiar with him. This is a small square home studio space, about 8ft X 8ft. I've treated the walls with Auralex wedges, and hung a heavy curtain in front of a glass window. It's far from a professional job, but I'm happy with how much better the room sounds already.

Essentially I need good near-field studio monitors (preferably powered) so that my mixes translate from my headphones. I was browsing a guide on selecting the best studio monitors, and it has me thinking about grabbing a pair of Yamaha HS5s. They are running $200USD / speaker, and I realize the bass can't be all that good in 5" speakers, but I would have budget left over to grab the matching subwoofer (Yamaha HS8 sub).

Anyhow, that's as far as I've gotten in my research... still gathering opinions :)