did you use some sort of software to set up the network initially or did you have manually access the router using the IP address? If you used the proprietary software, I would guess that you could rerun the software to get rid of the guest access.
+1 on the 24 inch 1080p asus monitors. I bought mine new for like 150 with free shipping. Its pretty good for 1080p gaming and was a fair price. Considering that you have a budget build going on I wouldn't worry about a new monitor until you are ready to upgrade your gpu. Monitors certainly get a lot higher definition and quality but that comes with a bigger price tag.
i was gonna say pawn shop but craigslist is a good idea too. you don't need anything high end. but seriously if you don't find any killer deals, just bear with that shitkicker for a while until you save enough for a monitor and gpu. I bet you'll have the money saved in no time.
Not a big deal. I don't really give a shite about USB 3.0. If you absolutely needed it you could get an adapter that would fit in a 5.25 bay. I don't ever use that many USB ports. You get 4 maybe 6 on the board itself and 2-4 at the front depending on the mono and case you pick. I also don't really notice a big jump in performance with USB 3.0 but the. Again I am not moving a ton of data via USB that often.