Interesting question. Personally I'd skip the roll mat filtration entirely. It's expensive and strictly mechanical filtration. If your system is typical, you likely have a loarge powerful skimmer on the system and this will take care of just about all your fine particulate matter in the water, even if your not using filter sockes or other mechanical filtration. For now save your money on this one, and consider that you can always add it larter if you feel it's going to do something for you.
As for a refugium, they can be a great addition, but I'd skip this also for now. Leave space for it, and an easy way to plumb it in later. Get the tank going and see what your water parameters and conditions are, and then add equipment as you see you need it. You may find that you'll be better off adding a calcium reactor, or algae scrubbing, or a controller or any other gear.
On thing I have found over the years is that once you get past having good filtration and good lighting, the rest is more or less optional and can be added over time, as you need it. Also, each addition piece of equipment while it does make an improvement, you'll find the improvements tend to get very incremental. In other words, it's better but not that much better. So save your money till you really need it.