I don't LAQ - yet! LOL and I do use Superior and King Tut on my Janome. I find KT a bit heavy though at 40 wt. I recently 'discovered' a brand called Wonderfil that has a 50 wt variegated and having used 50 wt in the bobbin already, surely this would work OK though I haven't tried it yet. The line is Tutti and has beautiful colours and no lint to speak of - I'd say it's quality is comparable with Superior.
http://www.wonderfilonline.com/index.php?cPath=21_35_53