Advice on upgrading my cpu

[WildgooseUK]

Your Advice needed please!
Currently,I'm running a AMD64 3500+ cpu on an Asus AN8-SLI Deluxe with the latest Bios and seeking to upgrade to a faster Cpu as my new Os Vista is on its way.
I'm torn between four Cpu that i've seen and need your recommendation on which it would be beneficial for my motherboard.
1) AMD Athlon FX60
2) AMD Athlon FX55
3) AMD Athlon 64 X2 Dual Core 4800+
or the Athlon 64 X2 Dual Core 4600+?

Which would you go for???

 

[WildgooseUK]

I forgot to mention that it's a 939 Socket
I thought I didn't need DDR2 to run the Dual Core Processors.
Anyway,the memory I got currently installed is 2GB of Crucial Ballistix Tracer with DDR PC4000 • 3-4-4-8 • Unbuffered • NON-ECC • DDR500 • 2.8V • 128Meg x 6.

 

[WildgooseUK]

Thanks Guys for all your Advice.
Seems to me that I would benefit greatly upgrading to a X2 4600+ and overclock
it to a 4800+ or more and save myself 30 pounds.

 

[WildgooseUK]

One other thing,
What Cpu fan should i get with the amd X2 4600+?Because currently I have a AMD standard fan that came with my current cpu.

 

[WildgooseUK]

Hello again Guys
I ordered a AMD 64 X2 4600+ and a Arctic Cooling Freezer 64 Pro CPU Cooler with Arctic Silver 5 Thermal Compound.What should I overclock too and how high can it go??

 

[WildgooseUK]

Thanks for your post.
How do you display your computer specs below your post?

 

[WildgooseUK]

Hello Guys,
I ordered a AMD Athlon X2 4600+ with Arctic Cooling Freezer 64 Pro CPU Cooler and a Arctic Silver 5 Thermal Compound over the weekend and should receive them tomorrow.
What do you think,Good choice?