Which of these 4 PSUs should I pick?

[Nonny]

[Solved] Which of these 4 PSUs should I pick?

Edit: It was PSU. Gonna buy Corsair, cheers.

Hello, I think my PSU is dying and I need some help. So, basically, I have upgraded and have been using Asus GT 630 1GB DDR5 just fine for almost a week when suddenly PC will not turn on anymore. Monitor screen just stays black along with yellow LED light (should be blue), but GT 630 fan keeps spinning. So I switched back to 8500 GT and it worked fine... for one more day.
I tested both of the cards on my sisters PC (just turned on and did not try to install drivers or test etc.) and they were working. I am going to test today my monitor on her PC and then her PSU on my PC but I am 99% sure it is my PSU, so I would be grateful if you could help me pick one from the few suggested at the bottom as I am no PSU guru.

tl;dr: Please, help me pick a new PSU out of these at bottom of the topic.

My current system:
Motherboard: Biostar 945GC-M7,
CPU: Intel Core2 Duo E8400 @ 3GHz with stock cooler,
GPU: 8500 GT 512MB DDR2 / Asus GT 630 1GB DDR5,
RAM: 2 x A-Data DDR2 800MHz CL5 2GB,
HDD: SAMSUNG Spinpoint F1 HD103UJ 1TB 7200 RPM 32MB 3.5",
PSU: Codegen 400x 400w,
Monitor: LG Flatron W2234S,
OS: Windows 7 Home Premium 32bit.

Current (dying PSU): Codegen 400x 400w
www.mainyk.lt/img/items/58/547/17/51bdcce3aa99f.jpg

Which one is the best?
Cooler Master B500 500w
www.coolermaster.com/product/Detail/powersupply/b-series/b500.html
www.coolermaster.com/images/upload/images/psu/B500-ph3.jpg

OCZ CoreXStream 500w (new line for Europe/Asia, so not much reviews)
ocz.com/consumer/psu/corexstream-500w-power-supply
www.pcekspert.com/jpg/articles/ocz_corex_500w/3b.jpg

Fortron FSP500-60APN 500W 85+ (80PLUS BRONZE)
www.fsp-europe.com/professional/fsp500_60apn_85plus.php

Corsair VS 450w
www.corsair.com/us/power-supply-uni.../vs-seriestm-vs450-450-watt-power-supply.html
i583.photobucket.com/albums/ss274/zsde/vs450.png

I have posted their product pages and output tables.

So which one I should pick? I am personally leaning towards Fortron and Corsair but I am unsure whether 450w will be enough. PSU will be mounted on top of the case and all of them should fit fine as my current Codegen 400x is 150mm x 86mm x 140mm. I wonder about the quality and whether the cables will be long enough for my ATX case. I know I should be going for better PSUs but I am building a new PC for studying soon, so strict budget on this one.
Thanks for helping!

 

[Mindweaver]

I'd get the Corsair, because it has a single 33a 12v Rail.

 

[Deleted member 24505]

I'd get the Corsair, because it has a single 33a 12v Rail.

Got to agree. Corsair

 

[AsRock]

Single rail all the way as the others have said.

 

[jboydgolfer]

I believe that there is a Corsair that is 450W that is ALSO modular as well. MAY be worth looking into for Your needs.

 

[Nonny]

Just tested monitor and it works fine. Also, used 350w PSU with 8500 GT on my PC and it did work, so after all it is the PSU.

Thanks for help I'll go order the Corsair.