Best asian beaches in june?

So I am planning a honeymoon to asia for june 2011. I want to go to Phi Phi, but i'm scared about all this monsoon season talk and about bad weather (rain, high humidity, unenjoyably hot). But I was wondering what beaches in south east asia would be great for a few nights (4-6). My fiancee and I aren't old, we are in our mid twenties, so we want to be abel to party it up A LITTLE. I don't need cancun spring break style partying, but I don't like the maldives because , well, it seems boring. So where can I get beautiful weather, and a decent nightlife, but not girls gone wild? oh, and of course, what asia is known for, decent prices...