ok, I am sorry.  Its just so very complicated for someone who has never done this before.  Here is what I am getting:

EVGA 8800GT 512mb 256bit GDDR3
http://www.newegg.com/Product/Prod [...] 6814130318

G.Skill 2 GB (2x1) DDR2 SDRAM DDR2 1066 PC2 8500
http://www.newegg.com/Product/Prod [...] 6820231144

GIGABYTE GA-P35-DS3L LGA 775 Intel P35 ATX All Solid Capacitor Intel Motherboard
http://www.newegg.com/product/prod [...] 6813128059

Intel Core 2 duo 3.0 ghz e8400
http://www.newegg.com/Product/Prod [...] 6819115037

300gb seagate SATA 3.0GB/s  (I own this already, have no link)

I was trying to make this as cheap as I could, but I want it to be functional, obviously.  How do I figure out wattage and amperage and voltage for what I have.

any recommendations?

These are what I was looking at:
xion
http://www.newegg.com/Product/Prod [...] 6817190017
Roswill
http://www.newegg.com/Product/Prod [...] 6817182032

after reading the faq, I am actually more confused.

Thanks!

My case is from 95', comp usa, I think its ATX

Don't skimp on your power supply!  Get one of these, much better quality PSUs:
 
http://www.newegg.com/Product/Prod [...] 6817703005
 
http://www.newegg.com/Product/Prod [...] 6817139004
 
If you want to save some money get ddr2 800 memory instead.

http://www.extreme.outervision.com [...] orlite.jsp
 
This will get you pretty dang close to what you want to know.

http://www.newegg.com/Product/Prod [...] 6817128011
 
^anything like this is fine
 
get it from a respected brand:
Hiper
Coolermaster
Akasa
Corsair Zalman
Enermax
 
i havnt heard of Roswil or Xoin so i cant comment, but dont skimp.
 
you case is from 95, what 1995?
CPU are much much hotter now and everthing has fans, you must really get a new case, please. you wiull never be happy if you use that old sow.
 
this wont brake the bank:
http://www.newegg.com/Product/Prod [...] 6811119115
or
http://www.newegg.com/Product/Prod [...] 6811119088
you will be better off with a e8200 and a decent case. you wouldnt make a royal live in a gypsy camp woudl you now (this may only aply in the UK - but apply it to a famous person a shed)

i agree with other two post, your skimping too much just down grade CPU for good case and PSU.
 
has anyone ever (but me) thought how bad new egg is to navigate in the UK we have scan.co.uk (which isnt great) but now i feel blessed by this web site.

ok, thanks guys.  I will take this all in and make a decision accordingly.
 
I may go for the new case, I have the money why not.  

thank you for getting a new case, but the PSU is just as important

The coolermaster cases are great budget cases, plus they aren't flashy (I hate flashy cases).