Is this upgrade plan for my computer good?

I just want to buff up my computer a little, but I need opinions or suggestions from others.

My Current PC specs (Lenovo ThinkCentre m58p-6138):

Intel Q45/Q43 Motherboard(based on CPU-Z)

Intel Core 2 Duo E8400 3.0 GHz with aftermarket heatsink.

6GB DDR3 PC 8500x2 / PC 10700x1

160GB SATA Hard Drive 7200RPM

Stock 280W Power Supply

MicroATX Case

NVIDIA NVS 300

Planned Upgrade:

Water Cooling for CPU (if necessary if i upgrade to a ATX mid tower case)

8GB (4x2GB) G.Skill Ripjaws Series (Model F3-10666CL7D-4GBRH)

1TB WD Black for Storage (SATA Port 1)

150/250/300GB WD Velociraptor for Game Storage (SATA Port 2)

Corsair SSD for Operating System (SATA Port 3)

Corsair 650W TX Series

EVGA NVIDIA GTX 650 Ti SSC 1GB

ATX Mid Tower Case.

*Only Have 3 SATA Ports (other one is eSATA)

1.Does the Power Supply fit in a micro ATX case? (if i don't yet plan to change to a ATX Mid Case)

2.Does the RAM compatible with my motherboard/system?

3.Does the Power Supply good enough for my hardware's?

4.Does the Video Graphics Card good enough? (for the micro atx motherboard, or i can put longer cards in it.)

It's my first time customizing a computer and I'm a little nervous about this upgrading because it might not work on my system and i only have a average knowledge about upgrading PCs So, I need help from the experts especially the PC gamers.

Thanks in advance.