true. i would say that the antec has a little bit more power but not really that much.
if you read the newegg reviews you can see that several people have had buzzing problems with the CORSAIR 450VX that the OP wanted
It's cheaper than the Corsair you listed, granted it doesn't have the nice single rail at 41 amp, but I would say the 3 rails with 2 22 amp and 1 25 amp rail would be a decent step up in power. I'm too lazy to get under my desk and open my case to check the sticker for total combined 12v amps, but I think it's over 50 amps.
Give the article a read, but I'll throw in a couple quotes:
"This power supply is manufactured by Seasonic. ... After opening this power supply we found out that internally it is identical to Antec Earthwatts 500 W, but using better electrolytic capacitors."
"...a relatively inexpensive power supply that even though is sold as being a 450 W unit can deliver up to 570 W at 48º C – in fact Corsair could have easily labeled this power supply as a 500 W unit, but they preferred to stay on the safe side."
Eh, jsc didn't specifically say that's what it was. I didn't look farther than the Earthwatts title and someone saying "Antec" + "52 amps". I would expect someone to be specific if they have something different than what's in the context of the conversation. But this is the intertubes and English = EPIC FAIL for most people.
How about a nice unit with 40A for the same price as the Corsair 450VX? Solves your power issues and gives you a good unit at a nice price. Seasonic released a nice 520W unit that is the same price as the 450VX and got a great review from jonnyguru http://www.newegg.com/Product/Product.aspx?Item=N82E168...