No. Believe it or not I actually think Vince is a worse defender than Marvin b/c I think Marvin actually tries. Vince is a volume shooter, also. I'd rather try and get a better all around talent like a Tayshaun Prince or a Gerald Wallace if we are looking to add a starting SF.
Another reason, no, is b/c Vince has 4 more years left on his deal making in the $15M range.
I think if we get to a point where we are motivated to move Marvin that we can get a more cap friendly, all around player than Vince.