Trying to buy new computer case. please help me

hi everyone.  

I have a built in computer and want to change computer case. my old computer case is too big. I would like to order the new computer case from tigerdirect. I am not sure which is going to fit with my current motherboard and powersupply also, I have 3 hard drive(inside hard drive one-build with computer inside..drive d.drive E.. )
please help me. I really need your help.

My Current computer specification is

motherboard:
Asus Striker II NSE Motherboard - nForce 790i SLI, Socket 775, PCI-Express 2.0, 3-way SLI, 45nm Support, USB, eSATA, RAID, Firewire, DDR3 Memory Support
MPN: StrikerIINSE

graphic card:
PNY VCQFX1700-PCIE-PB Quadro FX 1700 512MB DDR2 Workstation Graphics Card - PCI Express 1.0 x16, Dual DVI, HDTV

powersupply:
Rosewill RP600V2-S-SL 600W SLI Ready-ATX12V V2.01 Power Supply
Item #: N82E16817182032

Question 1

I am thinking to buy new computer case either raygo R12-40887 or Apex PC-389?
Anybody know Which one is going to fit with my current computer part?

1. Raygo R12-40887 R86 Mid Tower ATX Case - ATX, Micro ATX, 4x Int 5.25", 4x Ext 5.25", 1x Ext 3.5", 2x Front USB Ports, GrayItem#: R12-40887 | Model#: R12-40887
2. Apex PC-389 ATX Black Mid Tower CaseItem#: A355-2010 | Model#: PC-389

Question 2

I would like to buy smaller and light weight computer case possible. Do you think I can buy mini tower case will be ok to buy it? I have 3 hard drive I do not need to install all of it. Light weight is my first concern. Please recommend for me.
Thank you very much