Marin is a good brand. My using mostly road bikes I particularly liked a CHRML. framed model, a Verona that was out some ten years ago. Since then I've seen and read of a Verona model having an Al. m. frame with a carbon rear triangle so... ??

Many brands have the "composite bikes",1/2 Al., 1/2 carbon stayed; full Al. and a very few full CHRML. (steel as it's loosely reffered to) Needs narrowing down.