Evol and Sonic Nurse aren't mentioned enough. Get Bad moon rising also.
And Washing machine. And SYR4. In fact get everything.
except EJSNS which is crappy minus 3 songs. I know it's not a common opinion but I find their earlier stuff not as genuinely challenging as stuff they did after BMR. It's supposed to be raw and unconventional, but they didn't know their shit yet if u ask me. Buy CIS and KYI last (90% of the fans will tell you the contrary though cuz they read too many music reviews
).