Possible new build with unfound E8400!

Cannot find E8400 anywhere, and don't know of a good replacement. That's Question #1! If they start supplying again, this'll be my first choice for a rig: Some from Newegg, some from Techonweb (new to me, anyone dealt with them?), for price reasons:

Antec P180 = $132.; E8400 = $236; Diamond data fax = $19 (all Techonweb).

Gigabyte GA-EP35-DS3P = $155; HIS H387QS512NP (HD 3870) = $200; PC P & C Silencer 610 = $120; 2 Sammy Spinpoint T 320gb (no raid) = $150; OCZ Reaper HPC Edition, cas 4, 2 X 2gb = $121; Floppy = $7.00; Samsung 203B DVD = $30; Windows XP Pro = $140.00 (have SP1 CD, heard cannot update it); Arctic Cooling Freezer 7 Pro = $27.00; Antec case fan (for 4th case fan) = $13; 4 Right angle SATA cables; 12" Y cable for power = $4; Arctic Cooling MX-2 = $7; Koutech 3.5" multi card reader plus 5.25" to 3.5" adapter = $31. Total us $1423 plus techonweb's shipping.

Do I really need a new copy of XP? ny other thoughts? This will be used for regular apps, photo editing and hopefully this old geezer will get into gaming! I don't plan on much overclocking at all. Do I need a vid card cooler, & which one? Don't know where to start there! Thanks for all negs and pos's.