If you list a budget that your working with and what your intentions are , a partial rebuild or a whole new build. It makes a difference because of the different cpus that are out there and the different prices there are. You want to compare AMD with Intel but at what price point? For example this cpu is for $149.99.
Intel Core i3-2130 Sandy Bridge 3.4GHz LGA 1155 65W Dual-Core Desktop Processor Intel HD Graphics 2000 BX80623I32130
It's a dual-core cpu but it has hyperthreading which gives you four threads or four virtual cores so it can act like a quad core.
On a similar price point $134.99 you can get this AMD cpu.
AMD FX-6100 Zambezi 3.3GHz Socket AM3+ 95W Six-Core Desktop Processor FD6100WMGUSBX
This is a six core cpu from AMD and even though it has six cores it is rated lower than the i3-2130.
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
I don't think that you can get a future proof cpu as they are constantly releasing new processors and changing the socket for each new release. With AMD giving up on direct competition at the highend level cpu then Intel is alone at that level. There will be more competition at the mid-level cpu development and Intel has the lead regardless of level.
Give us a budget and ayour build plan so we can give a more accurate suggestion.