Right now I use these:
http://www.rei.com/product/721359
I've put about 300 miles on them and haven't had many significant problems but after sectioning Maryland a few weeks ago, my feet got pretty swollen and sore. I looked into it a little and saw that that can happen if you have big clunky hiking boots that are too tight. I also heard these types of boots are more conducive to blisters. I'm going to try and section from Springer to Harpers Ferry and then up in NJ/NY this summer and I'm not sure that trail runners would hold up.
I guess my big question, since I haven't been able to really find any good resources online, is what are the advantages of trail runners? Do you really sacrifice a lot of stability? Do they take less time to break in? I get mild shin splints from running now and again, would boots better serve me with the ankle support? Thanks in advance for the help.