Hey I still need more time with them. Been listening to hawaiibadboy's tracks and also trying it with Corda Jazz amp. This amp definitely pumps out less bass than Vali.
My comments on SZ2000's bass compared to those other cans were more about the quality of sub bass and extension. Sub bass quality and extension is great really. Some of those other cans I listed have more midbass like PRO 900, XB500 and D1100 for example.
To be honest I still don't think anything reaches PRO 900's levels of ridiculous over the top bass WITHOUT EQ. You can get those levels with just a bit of EQ on all bass head cans. Its mostly tons of mid bass that makes PRO 900 sound that way. The problem with PRO 900 is that it just sounds wrong to my ears. Maybe its the off center drivers (S-Logic plus) they use that makes it sound different to any other headphone I've tried.
If PRO 900 didn't have that crazy bass for us bass heads it would be one of the worst and most overrated headphones ever imo :D
EDIT: I think I'm going back to Vali. Jazz is too polite/transparent/neutral for me.