Logitech Z-5500 Digital 5.1 Speaker System. Bought it on sale for about $250 back in 2005, I've used it for hours almost every day since then and still absolutely love it. The only issue I've ever had is the back-light of the control module breaking but it's just a minor annoyance, just need to shine a light on it at nighttime to see the screen.
I got a set of Z-5500s right around 2005 as well. Unfortunately mine started making super-loud popping noises at random a year or so back. So far I haven't found anything to replace them, Logitech doesn't make anything in their class any more either.
I got the wireless 5450s. Had to replace the controller. Getting the replacements it was a guess between the sub and the controller. Which netted me backup of everything except the controller. Still works just fine and was used as primary surround sound until recently.
I've had a set of those circulating through the family for well over a decade. But, they don't sound all that great.
Fort the same budget, I'd recommend instead to buy a higher quality pair of bookshelf speakers that you would actually enjoy using fort the rest of your life.
I also made a YSK post recently to explain how to objectively identify good speakers.