kingron,
I can't compare the different schools that you mention, but I am at NAC at the moment doing the ATPL's and I can firmly give them my recommendations. Weather is great, people are great as too are the beaches.
If you want any specific questions answering with regards to NAC drop me a PM, and I'll try my best to help you out. I'll be here until July/August this year.
Cheers
Andy --- fellow scouser!!