Buying a new power supply

[EntranceInRear]

My Computer (only used for playing music) has a broken power supply it was:
Codegen 350W Atx 2.03 (P4) Model 300x.
The computer i need to replace the psu in is:
P4
Abit KR7A
one cd rom drive
floppy drive
two fans
4 hard drives (ce hard drives that i haveto take out of case to find out any more about them)

i'm sorry i have no idea about the watts reqs. for each thing.
i'll prob play it on the safe side and go with the extra wattage though...
what wattage do you think i need? was 350 enough and the fact that i kept it facing a wall (doh!) the only problem?
i'm trying to replace it as cheaply as possible. like around 30 bucks. i'm a bit confused about what type to buy because i'm not sure if i can buy any atx or only atx 2.03 (p4) kinds. i also need to make sure there are enough power cables for the six drives + other stuff. also, i'm pretty sure i had to only unplug the 20 wire cable from the motherboard and that there is no socket for the 4 wire on the mb. but the power supply i took out does have the 4 wire cable...

i'm so hopeless lol...

thanks entrance

 

[zipperman]

Best i can add

350 is OK,get another the same.I only have 375 and do a lot more then
listen to music.The main concern is makeing all the connections.
You really need a motherboared manual to do this.
Do you feel qualified ? If so,
Connect 1 HD at a time starting with Windows loading ok,then add the rest
properly set and connected as master or slave.

 

[kitty500cat]

This is a good, solid PSU: http://www.newegg.com/Product/Product.asp?Item=N82E16817163110

 

[Samstoned]

with that many drives use a 500 watt or better
make sure its got 2 fans