Hi Hookitup,

I have an electronics engineering background and I just received the parts for 6 of Ed's DIY speakers. His designs are extremely solid. I am sure you would be happy with any of his speakers. I won't build mine for about a month until I get my home remodeling done first. He is very enthusiastic and willing to help you in any way. I have spoken to him several times on the phone discussing speaker design. Don't hesitate on Ed's speakers.
The 5 ohm resistor will make the speakers more warm and the 4 ohm will make them brighter. I would base your decision on where you plan to place your speakers and room acoustics. I ordered the 5 ohm as I have harwood floors and other reflections I am trying to tame that makes my room more bright.
I hope this helps. If you want more info on things like crossover designs, driver seletion, etc. let me know.

Bob