Need help - Lenovo ideacentre K430 model differences

[mattlear]

I'm considering purchasing a lenovo ideacentre k430 i7 desktop.

I'm looking at two models in particular

3109-1MU http://www.compusa.com/applications/...428&CatId=4928
3109-2HU http://www.jr.com/lenovo/pe/LEN_31092HU/

I can't tell what the difference is between these two machines other than about $100 price difference.

Can anyone shed some light on what I might be missing?

Thanks!

-Matt