okeee

I've selected all components for a gaming pc.
-I do not plan to upgrade any parts, I want to use all parts as long as possible
-I won't overclock any parts or use SLI
-I hardly ever turn the pc off
-I prefer a quiet pc

These are some questions I have:
-Is the case still good for these hardware?
-Will all parts fit in this case and are they all compatible?
-Is there enough cooling/ airflow or do I need additional cooling?
-which parts are "too strong" or "too weak" compared to other components?

These are the components I selected:
Older parts:

-windows xp pro
-case: Antec SonataII (3 years old, without PSU)
http://www.newegg.com/product/produc...82E16811129155
-2 IDE hard disk
-2 SATA II hard disk
-1 DVD-player
-1 DVD-recorder
-1 floppy drive

New parts:
I've selected some parts from this $800 model:
-Motherboard: Gigabyte EP45-UD3L
http://www.newegg.com/Product/Produc...82E16813128372

-Processor: Intel E8400
http://www.newegg.com/Product/Produc...82E16819115037

-RAM Kingston 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model KVR800D2N5K2/4G - Retail
http://www.newegg.com/Product/Produc...82E16820134582

-Power Supply: Corsair 650TX
http://www.newegg.com/Product/Produc...82E16817139005

-Videocard: EVGA 896-P3-1260-AR GeForce GTX 260 896MB 448-bit GDDR3
http://www.newegg.com/Product/Produc...82E16814130370