Good luck this weekend, Colby. I definately would replace the shoes. As long as they are OK on your final runs this week, you will be fine.
DH and I did our last 20 miler this weekend and it was not bad-I guess I should say it was as good as they get! He really pushed the pace on the last 8 miles, so I think we averaged 8.45 or a little better. I just hope we can do that come race day. I'm just excited to be starting the taper-only 15 miles to run this Saturday!!