The thing with the bs1 is unless the fit is good you don't get the bass impact, but if you get a good seal with just enough air you can hear the impact and the quality of the bass is very good imo. Textured and well controlled.
If i were you I'd try all the foams, i was getting slightly different results with every foam and all ears are different so.
Yes I will have to do that. I like the sound with the full foams that were on them when they got here. But I could find a sound that I like better. I will have to check different ones out.