as far as gaming and multitasking go should i be leaning towards the sandybridge/ivybridge or amd?
you should go with ivybridge unless you plan on overclocking high to than sandybrige amd is a lost cause and junk.Despite what some people will tell you, I would not go with an AMD. AMD used to be nice because it was considered a cheaper alternative to Intel that would still get you pretty decent performance. That's not really the case anymore though, because their newest processors aren't much of an improvement over their last generation of processors. They're best 8-core cpu barely keeps up with the Intel i5 2500K, and it's more expensive.
Here is something for you to see FX 8150 gets walked over, trampled, and bulldozed into it's grave compared to the rest of those options. http://www.anandtech.com/show/5626/ivy-bridge-preview-c... Nothing like the most power hungry processor being one of the slowest tested either lol.Go with ivy or sandy you be glad you did mate.