The answer is, yes!  A quality paint may seem more expensive but can save many times it's cost in the longrun.

The type of surfaces to be painted may also influence how critical the paint is to a successful job.  Most anything on exteriors need adequate protection from the elements: snow, rain, sun, and dirt can exhert a lot of punishment on a home, or deck, windows and doors. 

In general, the higher quality paints have more solids by % of volume.  This simply means that once the paint film has dried, there is more film and more protection given to the surface. 

Simply put, a quality finish will last longer.  This can help to save a lot in the long run.  In general, a painting projects costs break down roughly to this: material 10-35% of total cost.  The remaining is labor cost.  Labor is by far the biggest expense.  If you spend a few extra dollars for quality materials, you will save a large amount from extending the life of a paint job.