Saw that you posted the same question in the General Discussion forum with some response. It would help if you included your budget and what it is you're looking for, speed, number of berths etc. There aren't many alloy trawlers out there. A trawler by definition tends to be heavy. So if you want a metal boat and weight isn't an issue it's a lot easier and cheaper to build out of steel than it is alloy. all these CG boats, Coastal Craft, Eagle Craft, Rozema etc mentioned are all fast planing boats, not trawlers. Sylphide looks like a really cool trawler and sure seems reasonably priced.
IMO, I wouldn't own an alloy boat that was painted. You'll spend your entire ownership either ignoring corrosion bubbled paint or spending money to repair it.
If you indeed are looking for a trawler and want metal look for steel.