I currently have the Logitech Z-5500 for 4 years, great system so far, but so limited in inputs, to the point that I will sell it, currently waiting for the Onkyo S5300 to arrive.
Why? because I need more inputs, features and HD audio decoding. Current devices are PS3, Tvix M-6500A, Wii and the PC.
If you have a good size room, I would recommend getting a HTIB, like Onkyo, you will get better features and functionality. If you don't want to spend a lot of money, a system like the Onkyo S3300
would be fine, getting good reviews so far on Amazon and NewEgg.
If you can spend like $200 more, look into the S5300
, much better than the S3300, also look at Yamaha. You can also look into separate receivers and a speakers set for better sound quality, but it will be more expensive, or not too far if you manage to get good deals.