If you get a good retreader there is nothing wrong with a cap. I have run them with no trouble.
Best if you have your tires capped so you know the casings are in good shape.
Here is a web site with a list of good tire shops
http://www.retread.org/Guide/
Retreads are high tech business now. Much better than they use to be. Expect to pay 1/2 or less of a new tire. You can get what ever tread design you like.