I decided on my boat. The HMCS Spikenard, K-198.
I thought would be a good tribute for the 100th Anniversary of the Canadian Navy.
She had a short career: commissioned December 6th, 1940 and lost off Iceland on February 11, 1942. 77 of her crew were lost with only 8 survivors.
Her vanquisher was the U-136, which itself was sunk in July of that year.
If I do another (or if someone else does) a 'Battle of the Atlantic' GB in 2011, I'll use my Revell 1/72 VIIC U-Boat kit to do the U-136 as a companion piece to the Spikenard.