If you can push that budget just a smidge... I would go check out the
Pioneer towers at Best Buy (or they can be purchased directly from Pioneer).
Since you mention both movies and rap music - and you are building slowly and starting with such a small budget... I have to presume that you won't have $400-$1200 for a subwoofer anytime soon.
With the FS51's you would at least be getting into the 45-50Hz range on the bottom end. That Denon should have no problem getting them up to reasonable volume - and they'd only be a movie-ticket over your budget.
You could even start with the bookshelves and center channel and get your 3 front speakers for about the budget you specified for the front pair. I would at least recommend giving them a listen - they're pretty surprising.
And if you have a BB near by - you can always try them out in your room and return them within 30 days if you don't like them or find them too insensitive for your intended listening volume.