PSU with detachable / modular cable management Vs stable cable (Recomm

PSU with detachable / modular cable management Vs stable cable (Recommendations)

Hello,
I was thinking about upgrading my PSU and I was looking at the following 2 Thermaltake PSUs

THERMALTAKE W0132U TOUGHPOWER 1000W (Modular Cables)
http://www.newegg.com/Product/Prod [...] 6817153053

THERMALTAKE W0155RU TOUGHPOWER 1000W (Non Modular Cables)
http://www.newegg.com/Product/Prod [...] 6817153056

Other than modular cable management, does the W0132U offer anything more?
Are modular cable PSU as stable as non-modular cable PSUs? I heard some time ago that they're not as reliable. Please correct me if I'm wrong!

Also what's the difference between THERMALTAKE W0132U TOUGHPOWER 1000W
& THERMALTAKE W0132 TOUGHPOWER 1000W?
http://www.e-shop.gr/show_per.phtml?id=PER.650669

My current setup:
Intel Core 2 Quad 9550 2.83GHZ @2.83GHZ (Regular Fan-Cooler)
Kingston HyperX 2GB 800MHZ @833MHZ
Asus P5B-E Intel 965 chipset (On-board 1Gbit Lancard)
2 x 1TB Seagate 32MB Cache Hds (Sata II)
2 x 512GB Seagate 16MB Cache Hds (Sata II)
Asus nvidia 7950GTX 512MB
Sound Blaster X-Fi Fatality Titanium Pro (PCI-E)
Winfast PVR 3000 Deluxe TV-Tuner (PCI)
1x Plextor DVD-RX 18x
1x Pionner DVD-Rom 16x
1 x 1.44 Floppy
Logitech Web-Cam (USB)
WinXP Pro

I'm considering about upgrading to a high-end GPU soon, so what type of PSU would I need for the above setup?

Thanks in advance.