I can't scream this at you loud enough...
DON'T DO IT!!!
This is a huge rookie mistake to buy an 'all-in-one' unit. You can't connect your cable box, game system, or if the BD player fails, you can't connect a new BD player. It's basically a waste of money waiting to happen.
So, I will say, that if you had to go this route, you should get the Sony, but you should not go this route.
Instead, on keeping strictly within your budget, get a entry level quality home theater in a box (which is something of an oxymoron)...
Packaged Systems | Accessories4less
One of the first couple of systems would be easily comparable, or better than anything you have linked above.
Onkyo AVX-290 5.1-Channel Home Theater Receiver/Speaker Package | Accessories4less
Onkyo HT-S3500 5.1-Channel Home Theater Package | Accessories4less
If you don't want the surround speakers, then don't hook them up! There is no requirement for this, and you can just run with a 3.1 system if you like. This is what I am doing in my family room.
You will need some halfway decent speaker cable, and this may be cheapest to get right from Accessories 4 Less when you order:
MONSTER CABLE S600-40 40ft Thx Speaker Cable w/Time Correct Windings | Accessories4less
I don't typically recommend Monster, but it is one of the cheaper options on their website and should work well in your setup.
Finally, an inexpensive Blu-ray player:
Amazon.com: Panasonic DMP-BD79 Blu-ray Player: Electronics
or
Amazon.com: Sony BDP-S5100 3D Blu-ray Disc Player with Wi-Fi: Electronics
This entire setup allows for the following:
1. If your Blu-ray player fails, you can just get a new one and it won't bring down your entire system.
2. If you hate the speakers, you can easily upgrade them as budget and desire allows.
3. If you want to add more to the system, such as gaming, or your HD cable tuner, you can easily do so (4 HDMI inputs!)
Fully integrated home theater in a box kits are just horrendous because they typically don't allow for any of those options, and they are built so cheaply that the BD player often fails causing the entire unit to become worthless. An inexpensive home theater in a box kit, like the ones I linked, aren't a ton better in terms of sound. The speakers used are every bit as 'cheap' as those in the integrated kits, but they offer so much more long term usability, compatibility, and usefulness, that they make far more sense.
Oh, and it comes in right about $300 depending on exactly what you choose.
Please - keep asking questions if you have any that you want answered.