My wife and I went fishing in our old aluminum flatbottom yesterday. It doesn't so much float anymore as it is in a state of controlled sink (thank god for the bilge pump). We decided it is time for a new boat. I am sick of patching rivets and holes in the old thing. I am wanting to get away from a riveted boats, but as we all know they are quite a bit higher (I've found about $1000-$1400 difference in the two with all other things equal). Are the welded boats worth the difference?