My Modern 5 has a set of Aero 5's Standards in it from Mike's shop. I called when I first bought her to get the general down-low, and they'd said it was an "experiment" and that they had only used Aeros for a run of 4-5. My Modern 4 has Fralins and I've played other Modern 5's with their custom Basslines, and I'd list my best>least (even the "bad" had great tone) as the Aeros, Fralins, and Basslines. I've found that to my ears they have a slightly stronger lower-midrange and slightly muted ultra-highs.
Hmmm, so one Lull fan says the Basslines are awesome and Ian says they are his least fav of the 3 he has.

I'm sure it's a personal choice. I would like to have that modern jazz/Marcus tone without a harsh high end. Does that help?
