Video conversion software using i7 HT ?

[threedee]

What software do i use to recompress my home videos quick ?
I have fair amount of 720p footage which takes ungodly amount of gigabytes the way its compressed.

I recently bought a new system with i7 2600k cpu, so preferably need software that can use i7's HT and other video encoding muscle.

Also something easy to use, i'm not starting editing lab here.

Any suggestions ?

 

[threedee]

And both of those use QuickSync ?
I have a discrete GPU (GTX480), and so far for some reason can only use CUDA but not QuickSync.