I can't recommend, using a bass amp for synths. All but the most expensive ones are going to colour your sound in a mostly annoying way.
I use Genelecs with a sub. I know some people who love their Yamahas (HS8?) with their synths.
Also wearing glasses for a very long time. I had a couple of on-ear headphones, that were very annoying. And for some reason, I can't use in-ears. They never fit.
I am very happy with my DT1770 and my Audio Technica R70x. Very comfortable for a big head with glasses.