At least audition the TSC's.
If you are handy or can become handy. There is a great subwoofer build which will smoke any subwoofer under 1000 and many above that. Usually it can be put together for a decent price.
You could also get a subwoofer kit from Dayton. I suggest looking at this route because you will end up with a better sub.
For speakers. I think the best bang for buck deal going is on the Infinity Beta series via ebay. You can get two Beta 20's direct from infinity for around 70 each including shipping. The bang for buck can't be beat. The build quality is excellent and these speaker have metal grills(something I prefer.)
that leaves you with at least 260 to 360 for a subwoofer.
I think in that range you can do a decent DIY
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-760
If you are very lazy and want easy. That DIY will be very good for the price.
We have a couple of geniuses on this forum when it comes to DIY sub options. They can recommend something in your price range, and your work level.