Yeah, they are bassy, however, they're not monsters. For instance, my XB's have all been monsters in comparison. The UE6000 is a bass monster imo. The Ultrasones, nah. Bassy? Sure, just not monsters. Also, they aren't especially EQ-friendly. The Pro 900's have other qualities though; I have never ever heard a headphone render synths as good as the Pro 900, that pairing was amazing.
I'll do a quick sound comparison test between all three cans shortly for a more accurate comparison on the sonics.
My thoughts ahead of sound test are:
SZ2000 - big, heavy, solid build, stock ear pads recommended to be replaced for improved comfort, shame about fixed cable.
77X - Full size but lighter than SZ2000's, handy rotating arm for DJ application, outstanding value for money, fixed cable seems a running theme with JVC as it is also here.
XB910 Lightest out of all three, exceptional sleek form fit factor, I think they look stylish, very comfortable, build is let down by mostly plastic used and can feel a little fragile, so need to be looked after - not as robust as the JVC' s, cable is removable with twist lock feature. Fold into a convenient size for travel unlike the JVC's. Best for portable use out of all three IMO also.
In UK the SZ2000's are most expensive priced around £240-£250, the XB910's are priced around £130-£140 and 77's by far the lowest best value priced around £60
Back shortly with sound comparisons between these three bass beasts
Thanks mate, I'm eagerly waiting for sonic comparisons.
I think personally that the XB's have gotten a bad rep around here, but I enjoy them a lot. Also, yeah, I know what you mean by that "plasticky" - they feel fragile, however I've accidentally dropped them a few times and they survived without blemishes. To put that in perspective; my Denons, which hinges are all metal, feel much more fragile than the Sonys.