I, too, am interested in purple-based tartans. Spirit of Scotland is probably my pick, with Scotland Forever, Pride of Scotland, Scottish Heritage, Clans of Caledonia, Heart of Scotland, Passion of Scotland, all close behind. Auld Lang Syne seems clunky to me. Haven't checked out Great Scot yet....

As folks have mentioned, the mill, sett size, and the weight change the look. Can't wait to see what you end up with!