I've been riding a Raleigh Port Townsend for the last three years, very happy. Today, I found a significant crack in the frame where the seat tube meets the seat stays. Bought used, so no warranty I think.

I'm thinking Surly LHT frame as a replacement.
Any other ideas?
i'm around 235lbs and have an easy 6mile commute. Also looking at the Kona Sutra.