You should grab the ZES if you like U signature, after quite easy mod, they are more open and the bass is the best KZ bass i ever heard, beating the long time champion budget bass for me, the XUN driver. Impactful but tight, good texture and reach deep.
To be honest I grab the ZES more than The Hola as beater set. They have Z1R DNA, if H40 is like baby Z1R, then the ZES is like his little brother of the baby, but have better bass part (H40 wins on technicalities of course, they are 1DD + 3 BA) but as overall, I like ZES more than H40. Super value fun set!
That sounds appealing. What is the ZES mod you're referring to?