I just got a loan at 1.74% for 66 months from Air Force Federal CU. Initially qualified for 2.24% and then they have a membership bonus of up to .5% if you meet a couple of different criteria. I was able to get the bonus by opening an account and having $10K in deposits at the time of the loan origination. You do not have to have the $10K in the account for the life of the loan, just upon the origination of it. So just moved it in and then will move it back out once loan is finalized. Easy Easy.
That is the best rate I have been able to find for that kind of term.
For me, financing makes more sense as I know I can earn more interest/gains off the $70K+ money in investments over the life of the loan as opposed to liquidating all that cash. I do like the peace of mind knowing there is no payment, but I like the money earned more... to each their own though.