My 1/4 sheet Sears sander is on it's last leg. Can anyone recommend a replacement? I'll be using it for finish sanding, fixing my glue up misteaks etc. Round or 1/4 sheet, dust collector or dust port (to vaccuum)? Variable speed? 5" or 6"? ARRGH.. Too many choices. I've sort of narrowed it to Rigid, Bosch or PC, but thats mostly based on color . TIA Gordy