The Traynor is the better of the two you listed IMO. The only issues is both use 6L6 power tubes which aren't really the best for hard rock or metal. I'd say EL34 tubed amps would be more suited for your style unless you're going to use the Traynor 40T for cleans and use a pedal for the distortion. The Custom Valve 50 Blue is probably more what you're looking for:
http://yorkville.com/products.asp?type=32&cat=18&id=318Don't rule out some used JCM Marshall combo options either.