Help with Yamaha home-theatre setup

[Newb2000]

Well i was planing on finally getting my home theatre system together now that i got my ps3, but problem is, it's a jungle out there. I do not even know where to start.

As there aren't many fixed systems for me to chose from, i have to get a package together by myself, and as i do not know much about the audio setup i would appreciate any help given.

In my search for good system setup i have come up with this mix:

Receiver: Yamaha RX-V663

Back speaker: Yamaha NS-333

Centre speaker: Yamaha NS-C444

Front: Yamaha NS-777

As i am not sure really sure if i need or if the system can handle a sub, i am not quite sure what to look for. What i have found sofar that seems to fit (at least in the price range) is either:

Yamaha YST-FSW100, Yamaha YST-SW215PF or Yamaha YST-SW315PF.

Now as i said earlier, i am a total noob when it comes to hifi/home theathre systems, so i am not quite sure what is good/bad and what i am to look for.

Is this mixup any good? My intended uses are movies, games and some music.

Would this system mix do, or do i need to change anything? Any help is welcome and if anyone has any of the items mentioned i would appreciate to hear what your opinions are about them.

Thanks to anyone who takes the time to help me out a bit