what power supply should i get to fulfill the requirement for the geforce 8800gts. the specs for it are minimum of a 400 Watt power supply with +12 Volt current rating of 26 Amps. im not an avid gamer, i just watch movies, does that still mean i need a better psu (right now my stock psu is 300watts. if i should get another psu, what are the good brands and for around 50bucks. thanks