D-Link DGL-4300

I was wondering, when speculating about whether I should buy the DGL-4300, if the DGL-4300 is just a router and thus requires a modem to be connected to it, or am I simply able to just plug in my internet line into the DGL-4300 and after setting it up, I'll have it working? (Long sentence, woo!)

Thanks a lot man - So, does this router also handle 8 Mbit+ internet speeds in practice? (I've had routers that said they could handle ADSL2 which is 8Mbit+, but in fact they could never gain a higher speed than 7900 Kbit )

Edit Or does that depend on the Modem?

Anyone that can recommend me a (cheap yet good, doesn't need to be SPECTACULAR) modem to use with the DGL-4300?
As said, it needs to be able to handle ADSL2 speeds. That's it really. It should be cheap too XD (I'll be nearly broke after getting the DGL-4300 lol)

Im using the Dlink di-634m which is very similar to the 4300 without the gaming features, it uses the same chip. Ive found it handles my 15/2 cable connection very well and performs far better than the Belkin 7321-4 that it replaced. The Belkin would always freeze up on me when downloading large files on Utorrent but the Dlink is rock stable no freeze ups so far and its been almost 2 weeks. Also my download speeds on Utorrent increased an average of 25%. Also with my Vonage voip I would get pretty crappy voice quality with the Belkin but now wioth the Dlink it works flawlessly. So if the di634m is this good the 4300 must be at least equally as good if not better since its got the gaming features and gigabit capabilities.