The soundcard choice is great, I was going to get an EMU0404, but instead went and got an EMU1212M. Both are great choices for cards. Firewire cards, your looking at spending far more money unfortunately, but if you are looking for a firewire card check out the M-Audio Firewire 410.
Speaker wise, never heard the Rockit 8's (Unless you mean RP8's?, which are a fairly liked monitor). However I have one recommendation that you should check out. A smaller company called Yorkville makes some monitors called the YSM-1P. These are what I own, and I love them. They blew everything under 800$ CDN a pair (I picked them up for 600$ a pair) out of the water. You should be able to pickup a pair for 450$ USD. Their's a link here http://www.yorkville.com/products.as...cat=20&type=33
I love them, and dare you to find a single bad review about them. Combo jack that's balanced 1/4" / XLR too, so it fits right at home with the EMU card. Please note that the EMU0404 is NOT balanced, whereas the EMU1212M and above ARE balanced.