Does anyone have any suggestions on how to select value by using SUMPRODUCT?

In column A, there is a list of date, and in column B, there is a list of
value, and
There is a given date in cell C1, and a given error range in cell D1.
I would like to select the date in column A with the highest value in column
B based on the range from the date C1-D1 to the date C1+D1.

For example,
6 Oct 07 65 1 Oct 07 3
5 Oct 07 35
4 Oct 07 44
3 Oct 07 88
2 Oct 07 65
1 Oct 07 17
30 Sep 07 53
29 Sep 07 25
28 Sep 07 44
27 Sep 07 96
26 Sep 07 76

The given range is from 1 Oct 07 - 3 = [28 Sep 07] to 1 Oct 07 +3 = [4 Oct
07].
The highest value in column B within this range is 88, then return 3 Oct, 07
in cell E1.
Does anyone have any suggesitons?
Thanks in advance for any suggestions
Eric