need some advice

wel i have 1800 XP and my cpu temps pretty high idle 43.5C/ load 47C i tried cooling it by having my side panel off adding a case exhaust fan and a slot fan under my graphics card to vent out hot air but it's not doing anything my heatsink it suppose to be doing a lot more here it is....http://www.nexfan.com/evcucoacofrs1.html
should i just get a new case maybe mine's too cramped or somethign i dont know but i really want to get my temps down any advice? here's a case i might look at it has no power supply but i can just take my 400w supply that my computer has now right? (i'm a noob)
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?sku=DRG-C-BL

look at the review for the heatsink and fan that's on that site a little lower it says his 1700+ proc was at 38.5 load!! why is mine so high??!!!!

first of all if those are die/core temps they are perfectly fine

i'm assuming you're not overclocking this thing

are you using thermal tape/grease on this heatsink?

when ppl apply too much thermal grease it usually traps all the heat and causes temps to rise

at 47C load
thats a decent temp IMO

whats your system temp?
whats your room temp?

check on your case cooling
make sure youre getting a good airflow