I have a 4HH, it's brilliant. A 2004 model in graphite pearl, the best sounding and playing 4 string i've ever had.
Only reason it's not my No. 1 bass is the 5 string HS I have, but doesn't quite play as effortlessly as the 4.
That aside, what else can do a Bongo ? Nothing really, the 4 band EQ I see as the crucial part of it's flexibility. A bass that's as versatile but sounds nothing like it would be a G&L L2000 or M2000.