The best 9mm?
To me, its the Browning Hi-Power. Slim, simple, well made, all steel, accurate and the best trigger.
Honorable mention goes to (and these are VERY good 9mms)...
Sig's 226 and 228 (the W. German made models)
Sig's P210 (if you can swing the 3 grand price tag)
HK p7...