With great credit, you can finance at “30 days same as cash”. In other words, if you pay within 30 days, it is just like paying cash. I am not saying every dealership will do this, but it can be done. The $1000 down would help.
But I suggest strongly you don’t. Spend a couple days shopping. Leave your checkbook at home. Make it clear you will NOT “buy today” no matter what. This is very very important. Say NO!!! No matter what they tell you. If the salesman still treats you nice, then be sure to go back to him- if that’s one of the cars you have settled on.
Now then, once you have found a couple cars you like, then (unless one of them is a Saturn or a Toyota*), then go to Consumer Reports and pay for their report. It’ll cost $12, and save you hundreds, maybe even a thousand. An extra $10 gets you an estimate on your trade in.
Now, if you have great credit, and that automobile company is offering 60 month financing at 2% or lower (look in the paper)- then that’s fine, you don’t need to go to your bank or CU. Do note that Consumers Reports and others would like you to buy based upon 48 month financing, but that just isn’t practical for most dudes, and with cars lasting 10 years, 60 months is fine.
Then, take your report to your two dealers (I am assuming two different manuf.). Show it to them- they’ll usually pretend to get mad and say that CU is full of shit, but they’ll come around. Tell them up front that you are now planning on buying a car today, and theirs is one of two. After you get the price you want,* then* haggle trade-in. One thing at a time!!! Play off one against the other. Do note- the two cars should be somewhat the same- not a Hummer vs a Hyundai compact, right? 
*Two exceptions here. If you are going for a Saturn, then no need for the $12 report. They give a fair flat price, and they don’t haggle (well, maybe you might get free mats or something… can’t hurt to ask, keep it under $100). They do haggle a bit on the trade in, so do spend the $10. I think they are offering cheap financing now, too. Great cars.
On to Toyota. One word- don’t. Great cars, but never, ever buy a Toyota from a Toyota dealer- they are the worst crooks in the business. If you must buy a new one, do it through a Broker. Do get the $12 report.
Right now, those gas-electric hybrid cars are hot, and you’ll not get much of a discount. Well, Toyota will try and charge you several thousand OVER sticker! :eek:
Undercoating and overcoating and just about everything that the dealer adds on is not worth it. Including an extended warrenty- well, maybe unless it’s a used car- caveat emptor.
Last word- if you currently own a XXXX (and think it’s nice manufacteror)- look at XXXX’s first. Check out “buyer loyalty” bonuses- this can be $1000 or so. Nice.