If you trade Howard and improve the defense in front of Mrazek, it'll make Mrazek's job a lot easier, and can help his development without risking losing games due to rookie mistakes. I think it'd be best if we move Howard to improve other areas and sign a serviceable veteran to back him up.
SportsK all the way. Amazing site. I recently bought a really cool jersey from them and then was bummed because it was too large. I sent it back and they returned a smaller size so fast that I was very impressed. A lot of people on this site including myself have had a great experience with them.