I apologize for raining on your parade, but the thread and the poll within asked for my opinion.
From what I've seen from Walters, and based on his minor league track record, he looks like another Anthony Swarzak to me. A marginal starter or long reliever. I don't think the Twins should cut him, but I'm expecting the AL to catch up to him quickly.
I would like nothing more then for Walters and Diamond to help anchor our rotation for the next 4-5 years, however unless Rick Anderson is a true miracle worker I would be thrilled if ONE of those guys ended up being a solid #4/#5 for the next couple years.