I have a stupid question.

This is the first coin I have mined with x11, So I know very little about it.
I was mining at Dedicated pool at the start, but as soon as the scrypt multipool started, I switched over to them, hoping for a better payout. I was not disappointed, I think it worked out quite well.
Now the multipool offers x11 mining as well. I see that alot of people were waiting for X11 before joining the multipool.

Which should I be mining?

Here is what I have. 2 PC's running a total of 5 HD7950's.

They get about 625 kh/s each scrypt (3.125 Mh/s scrypt total)
For X11 they each get about 1.8 Ms/s (9 Mh/s X11 total)

I run these at my work so electricity is free and heat is not a factor.

Now that I can choose scrypt or X11 at the multipool, what is a better choice?
What will get me the best bang for my buck? Sorry about the stupid questions, but I just don't know which way to go and I am hoping some of you salty dogs know the right choice.

Thanks!