The whole Pioneer package is fantastic for the money. The 521 is a great sounding amp, and the auto calibration is an excellent feature. Especially if this is your first home cinema venture. The option to add on bluetooth is pretty sweet too.
The BDP 140 is a excellent blu-ray. Compared to other players around the same price it blows them out of the water. Great sound and picture. You can also connect this into your network at home via ethernet. This will then give you access to Youtube which is pretty cool.
The speaker pack is good for the money, sub packs a good punch to it. Nice compact speakers too.
Good thing about the above system is you get everything you need to get up and running. You can then upgrade each part at a later time if you wanted. But once you get it all up and running I'd say you'll be very pleased.
The only thing you'd need for the above is HDMI cables to connect your amp to the TV and the blu-ray to the amp, speaker cables to connect your speakers to your amp and also a sublink cable for your sub.
I've got everything in stock except the speakers. Got them coming back in tomorrow tho.