I went through a similar mental routine when buying my '05 two years ago. Everyone has "must haves" and in my case I only compromised on one item - the transmission. I did that because the truck looked and drove like it just came off the showroom. The original owner was obviously very fussy. It also had a 2-year extended warranty that just ended last month.
As was said, you seem to be almost wetting yourself for the '03. Should you buy the '07, six months later you will have forgotten about the '03...count on it.
We all say we are going to keep the next vehicle we buy "forever," or "until the wheels fall off," but in truth will we? Be honest. That means at some point in the future we will sell it and we'll want the most we can get when that time comes. During my search I discovered there are a number of "options" that don't resell well. A used Ranger with them can be had for several thousand less than it otherwise would. They are:
- Sport box. Nice looking, but very limited in carrying large loads. An ATV for example. Won't fit. It will fit in a slab side. More than anything else this seemed to affect used pricing.
- "Short" Cab. With a pick-up there is less secure storage than a car. An extended cab makes a lot of that problem go away. Interestingly, in California 90% of the super cabs are only 2-door, in the mid-west 90% are 4-door.
- Manual transmission. I wanted the auto, but everything else was there so I sucked it up. A lot of people must feel similar as the value of manuals is less than an auto. Most reading this forum are younger and like the manual, but it limits your resale audience.
Most everything else didn't seem to make too much difference in price and should be looked at from a "do I really need it" point of view. Many times we cloud our decision because we think we need something. Do we really? If the answer is yes, then go for it.