Rust Days

I've been comparing the last week of marathon training plans.  It's taper-time and I want to be clear on how much is enough and how much is too much rest.
For me it comes down to rest or rust.  I find overall that my legs are happier while regular runs but that days off tend to make me aware of tightness (IT Band) and pain (knees). 

This last week before the marathon looks like this:

Sat   1/28    10 miles (5 at marathon pace)
Sun  1/29   4.5 miles
Mon 1/30  2.7 miles (slowish pace)
Tues 1/31  6.1 miles (4 at marathon pace)
Wed 2/1    2 miles (maybe in the five fingers)
Thurs 2/2   3 miles (marathon pace)
Fri    2/3       2 miles (super easy)
Sat   2/4      DEATH VALLEY BORAX MARATHON!

So, I think I'll choose restful short runs over rust days this week.