I agree. I bought my TR-606 new along with a TB-303 bassline. Although programming songs on the TR-606 was a nightmare, it still sounded great. It was the perfect drum machine for me at the time because I was heavily into Soft Cell and the first two Depeche Mode records.
I then bought an E-mu Drumulator. While it was far more powerful than the TR-606, I didn't really dig it's fake-sounding, super lo-fi "acoustic" drum samples. So I bought an EPROM expander from of all companies, DidiDesign, who got their start making upgrades to units like the Drumulator WAY before Pro Tools.
My particular EPROM included a bunch of Simmons-like drums which I loved. I never used the stock Drumulator sounds after that.