19k for an 04' is an awsome deal. If you can get in an 04' for under 21k and an 05' under 24k ( keeping the mileage in line) your doing great.
I agree, an automatic is nicer. I had the same issue when I first got mine, I thought I wanted the manual, but the auto has e-shift, so that's the way I went.(another toy to play with.) Plus the auto shifts soooooo nice. But the manual is more controllable, and is fun, but then the daily grind of city traffic can make it work, and then of course there is that "spirited" drive thru the country when manual is nice to have, but then again it's hard to talk on the phone or drink a coffee with manual, ooohhhhh, decisions,decisions............
Oh, and just a tip,,,,,get an IS 300. You will not be dissappointed.