Hi lennyx,
Here is a link where you can compare just about any 2 graphics cards. It covers many different games and resolutions. I have it set to compare the 660ti to the 670 but you can change it to any 2 cards.
It doesn't cover the 1920 x 1080 resolution so the closest would be the 1920 x 1200.
Here is a custom build that is under 1500 and the case has a front Firewire connector. Other comments after build.
Ticket #720352 Cost $1494
Chassis Model: Special Deal Hot Seller - Corsair Carbide 500R (Black Finish)
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i5 3570K 3.40 GHz (Unlocked CPU) (Quad Core) (Requires Z77 Motherboard)
Motherboard: ASUS P8Z77-V LX (Intel Z77 Chipset) (Does Not Support SLI)
System Memory: 8GB DDR3 1600MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested)
Power Supply: 800W Corsair GS (Dual SLI Compatible)
Expansion Bay: - No Thanks
Hard Drive Set 1: Operating System: 1x (500GB Western Digital/Seagate/Hitachi/Samsung (7200 RPM) (16MB Cache)
Set 1 Raid Options: - No Thanks
Hard Drive Set 2: Multimedia\Data: - No Thanks
Hard Drive Set 3: Backup\Misc.: - No Thanks
Optical Drive 1: DVD-R/RW/CD-R/RW (DVD Writer 24x / CD-Writer 48x)
Optical Drive 2: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Video Card: 1x NVIDIA GeForce GTX 670 2GB (Includes PhysX)
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: AIR: Stage 1: Cooler Master Hyper 212 EVO (High Performance Cooler)
H20 Tube Color:- Not Applicable, I do not have a FrostChill or Sub-Zero LCS Cooling System Selected
Chassis Airflow: Standard Factory Chassis Fans
Internal Lighting: - No Thanks
Enhancements: - No Thanks
Chassis Mods: - No Thanks
Noise Reduction: - No Thanks
LaserMark: - No Thanks
Boost Processor: Stage 1: Overclock CPU 4.0GHz to 4.4GHz
Boost Video Card: - No Thanks, Please do not overclock my video card(s)
Boost Memory: - No Thanks, Please do not overclock my memory
Boost OS: - No Thanks, Please do not tweak the services on the operating system
Windows OS: Microsoft Windows 7 Home Premium (64-Bit Edition)
Recovery Tools: Windows Recovery Toolkit (Bundled with Windows 7 CD)
Virus Protection: - No Thanks
Office: - No Thanks
Game: - No Thanks
Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
External Storage: - No Thanks
Exclusive T-Shirt: FREE: Digital Storm T-Shirt - Black (Extra Large)
Priority Build: - No Thanks, Ship Within 10-15 Business Days After Order Is Successfully Processed
Warranty: Life-time Expert Customer Care with 3 Year Limited Warranty
I used the 500R case. It is a mid tower case with good air flow and is available in black or white and has a front Firewire connector as you requested.
I used the GTX 670 graphics card as it is still within your 1500 budget.
For stage 1 OC the Cooler Master Hyper 212 EVO CPU cooler will do just fine.
I hope this helps and let us know what you think.