We need more info to help you out. Specifically a budget for the speakers. We could recommend a full on SVS Ultra package, but if your budget is $2k for the speakers, that obviously won't work...
As for the sub, get the ported if you have the space for it.
Edited to add:
Play around with the SVS system builder tool
here, I'd recommend the Prime pinnacles for your fronts and the ultra center if your budget allows.