Smithy, it is a very confusing world indeed.
Firstly, what am I going to use this beast for? What operating system? 32 or 64-bit? What applications will I be running? This will give some indication of the quantum of the computing package you require.
Next we start selecting technologies. There a lots of things to consider just selecting the CPU, let alone the motherboard, memory, video, etc, etc.
Then there's manufacturer, ie. intel vs AMD for CPU ... then there's chipsets, etc, etc
But to help answer your question, have a look at this intel CPU ratings chart ->
http://www.intel.com/consumer/rating.ht ... tar-ratingThere's also AMD CPUs which adds to the confusion ... here's some info ->
http://products.amd.com/en-us/compariso ... opCPU.aspxThe advice from the others is correct, dual core is effectively 2x processor speed, quad core is 4x. I personally wouldn't go higher than a dual (duo) core CPU.
For what it's worth, for home I personally build PCs to my spec taking into account the every changing technology out there from a cost of ownership perepective.
So I don't select a particular CPU for instance, but a class of CPU and find the corresponding motherboard that will suit. Again a personal preference, but I use the 'buy the worst house in the best street' mentality, which means I will generally go for the lower spec CPU but a much higher spec motherboard that can accomodate technology for the next 2-3 years. So if we're talking intel here, I'd go for the cheapest motherboard (for around $100) that could accomodate intel E & Q series CPUs, which would include Pentium, Duo and Quad core CPUs, then you have a choice of a Pentuim E5000 series Pentium, Duo E7000 or E8000 series, or Quad Q6000, Q8000, Q9300+ series CPU (start at around $100 up to $400+).
So if I want to upgrade I try to avoid as much as I can having to buy a new motherboard/CPU/RAM combination 'cause the 3 have to work together.
The other take it or leave it advice is not to get sucked into buying the latest and greatest because you will burn big holes in your pocket. That little extra to get the next model up or 2 CPU is highly unlikely to make any real performance difference.
I hope this helps, if not, sorry for confusing you further.
Dunno, I’m just an idiot.
I’m only the administrator of the estate of dedja