take the 1.9% versus the $1000 cash back if you are going to finance the vehicle... i agree with hmgrock, over the course of the loan, you'll save more...
i just checked my credit union and the auto loan is @ 3.99% apr... granted you have good credit which it sounds like you do... don't be so skeptic about dealerships... sure they may try to get you to tact on more things per what duma said but...
i have financed all of my, at the time brand new, toyotas through the dealership because i did my homework and toyota more often than not offer the best apr... my rav was zero interest through toyota...
my suggestion to you is to negotiate the "out the door price"... depending on where you live sales tax can be as high as 8 plus percent here where i live...
if it were me i'd counter with 34k out the door and financed at 1.9 apr for 60 months...
oh and to me gap insurance was important... gap insurance insures the difference of the value of your depreciated vehicle versus what you owe... have it for at least the very first year you own your new vehicle... after the first year you can call the dealership to have it removed...