It's tricky question but so important for every men.
There is a similar situation as in politics: Whatever I'll write it can be denied.
I'll try show my point of view, because I know these two states.
First and foremost if you decide get marry you can't back if you change your mind to late.
On contrary if you are a single you can often change your mind.
Everyone women is different and everyone has different advantages.
Your have calm mind because your didn't have to get used to their drawbacks.
You can tell Good Bye if you feel that she is candy eye or whatever.
You don't have to do things which you don't like.
On the other hand if you are married you have stability.
You can plan years ahead because you have basics.
It's easier grow up and think prospectively.
You can have children and together care about them.
In conclusion there are different points of view and both can give happiness.
Everything depends on you.
What you prefer and cause that you are happy.