If you do end up with the RC10's make sure you get them here:
http://www.amazon.com/dp/B001BYCUPW/?tag=neogaf0e-20
Otherwise, you might be seeing a $600 price tag. Certain finishes are on sale for $300... That's the one I have. The Hsu, I've heard that it's only flaw for its price point is that it doesn't really have super good bass. It is meant to be used with one of Hsu's subwoofers. So if you need bass, you may want to steer away from that. The RC10 has very good bass for its size.
Ultimately, I think it all depends on what you will be using speakers for. If you're only going to use it for computers, then those two might not be what you're looking for because they require the typical stereo plugs. I'll look for some other models if you use it solely for computers.
If you want to use it for general purposes, like computer, television, etc, a receiver would definitely be preferable, but you can get away without it if you have a stereo at the house. Just look in the back and see if your speakers have auxiliary in. If so, disconnect the stock speakers and just take the console and wire the new speakers to it. Then connect your source to the consoles auxiliary in using RCA stereo plugs. You will need a DAC if you want to use it with your computer audio unless your computer has an optical out on it.
You can get very good receivers if you look around. The receiver I have, the HK3490, has a standard retail price of $500 and typically sells online now for $450. I was lucky to get it for $350. However, you can go to ebay and bid on a refurbished unit significantly cheaper, and it's from Harman Kardon, so you get the warranty and all. You may be able to walk away with one for $150.
http://shop.ebay.com/i.html?_nkw=hk..._dmpt=Receivers_Tuners&_odkw=hk3490&_osacat=0
Honestly, this audio game is all about upgrading in steps. If I were you, the first thing I'd do is snap up the RC10 because I believe they are being discontinued and they normally retail at $600. These are excellent sounding speakers and you won't have to upgrade for a very long time.
For now, I'd then use them out of a stereo console until you can grab a decent receiver for cheap, either the HK3490 or something like this off of audiogon:
http://www.audiogon.com/cgi-bin/cls.pl?miscrcvr&1257799442&/Yamaha-RX-V2095-natural-sound-
I'd keep a watch out for that 3490 on ebaybecause its a new model and actually has digital inputs. The sound is excellent.
Finally, I'd get an emu0404 off of ebay since it works very well as a DAC, which you can use to translate digital sources such as computer audio or PS3 optical out audio into a format speakers can read.
If your budget is $200 for a long time and you just need computer audio, I'll take a look at a few other options for you.
