Overall, I guess it comes down to an iron v. redstone resource issue. Do you use a lot of redstone, and have iron to spare? Then do this with wireless turtles.
I should note that I have a program that lets you recover the disk drives too, so really resource-wise it's all on the side of the computers. Programming side it's still a split between writing a turtle gps server and having all the file transfers and stuff, but since programs are kinda infinitely reusable I see it as a non-issue.
Edited by ChunLing, 02 November 2012 - 11:42 AM.