Wow for 240$ ? niice. Yes that would definatly be enough. it might be a bit too much actually. Run the voice coils in parallel and then 2 speakers in parallel with each other for 1ohm. but then you are running them at 600 rms a piece when they are rated for 450 rms.
Perhaps getting this Amp
http://www.hifisoundconnection.com/S...44239234235236
and running it at 4ohm (run the voice coils in series with each other, and then the two speakers in parallel to net 4 ohms) The amp will run cooler that way and last longer
It should also have less distortion.
You will need a capacitor I'de go with what the industry calls a 1 faraday Cap, although in reality its 1 micro faraday but don't bring that up in a stereo shop or they will look at you a bit confused.