I'm all for contentedness, but I'm also an advocate for healthy eating and recognising that being overweight is not a good thing and can impact your health - if not now, then down the line.
I would suggest you find yourself a decent cardio routine and drop some of the "padding".  As SX0877 said, a well-balanced diet is going to benefit you in many ways.  Look at getting a men's multi-vitamin and taking it religiously.  
As far as whether or not being overweight can impact your surgery results - well, yes it can - but it doesn't mean you'll get terrible results automatically.  You may have a risk of actual complications like higher blood pressure, etc. - the results themselves, well I've seen good results from guys here who are oveweight - but I suppose some complications could be dog ears or, later down the line if you decide to drop weight, having some issues with puckering.  But that's all I can think of.  Good luck.