best fraternities/sororities nationwide?

I've been asked this before(not here) but from what I've seen from friends at other schools is this(in no official order) -

Best fraternities
- Pike
- SAE
- Sigma Chi
- Phi Delt
- Lambda Chi

Most of those are kicked off at FSU, but the ones that have been kicked off used to be good.

Best sororities
- KD
- Aphi
- Zeta
- ADPi
- Theta
- Pi Phi
- Phi Mu(in the south)

Who is 'top tier' varies by region. In Florida, the top fraternities campus to campus tend to be ATO, Pike, Phi Delt, SAE, Sigma Chi, KA and maybe Theta Chi.
There are other states and regions where Sigma Nu, Fiji and even Kappa Sig or Lambda Chi rise to the top.
There are about a dozen really strong nationals.

You have to add Beta Theta Pi to the list of great nationals. They may not be a top tier factor in Florida but virtually everywhere else and especially everywhere other than the south the Betas are major players on just about every campus. True.