I say it's definietly worth it especially if you have a protein skimmer. Being able to put your heater and protein skimmer in your sump and take them out of your display frees up a lot of space and looks much better. Also if you put a big enough return pump and some loc-line you can even ditch your power head if you get the flow right.
I definitely recommend using the pvc overflow as well because they're cheap, easy to make and actually take up less space than your average overflow box will. I used one in my old 20 g setup and it worked great!