http://www.newegg.com/Product/Product.a ... 6827135151
http://www.newegg.com/Product/Product.a ... 6835191007
http://www.newegg.com/Product/Product.a ... 6822148212
http://www.newegg.com/Product/Product.a ... 6820134046
http://www.newegg.com/Product/Product.a ... 6819103774
http://www.newegg.com/Product/Product.a ... 6814127297
and your vista:
http://www.newegg.com/Product/Product.a ... 6832116200
It's probably quieter than your current computer, but much faster

Get rid of the win 95 computer, put your current computer in it's place and use this one as your current computer. The processor runs cool so the fan shouldn't be loud, the case fan I picked out is quiet, the video card has a big passive heatsink and the power supply is only 250W so even if it does have a fan it should be very quiet.