If you think you might get more serious about this down the road I agree with the others who said ditch the sub for now and get the best monitors/floorstanders you can afford (some good ones listed above) along with the best NAD integrated you can fit into your budget (used would be a good idea for the amp -- speakers are a little more risky used).
If this is really just for casual and/or background type listening you could save some $$$ and just buy something like this that should be more than fine...
http://www.hsuresearch.com/products/value2pkg.html
Best of luck.
If this is really just for casual and/or background type listening you could save some $$$ and just buy something like this that should be more than fine...
http://www.hsuresearch.com/products/value2pkg.html
Best of luck.