So, I sort of upgraded a bit ago from a Nvidia 240 to a 560 (because of the prior recommended specs being 5xx). Now it's a 660 specifically. Any benefit to upgrading? And would my system benefit or bottleneck a 660?

Current system:
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System Information
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Time of this report: 3/10/2013, 11:05:00
Machine name: JILL-PC
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130104-1431)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Studio XPS 8000
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz (8 CPUs), ~2.8GHz
Memory: 8192MB RAM
Available OS Memory: 8184MB RAM
Page File: 4073MB used, 12291MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: 120 DPI (125 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
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Display Devices
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Card name: NVIDIA GeForce GTX 560
Manufacturer: NVIDIA
Chip type: GeForce GTX 560
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_1201&SUBSYS_14603842&REV_A1
Display Memory: 4050 MB
Dedicated Memory: 978 MB
Shared Memory: 3072 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: ASUS VH232H
Monitor Id: ACI23F1
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: DVI

(650W PSU)

EDIT: Lookin' at you Dhalmel^^