Thank you for the help so far. Heres some more questions that might help me out. I know that in the end I'll have to go hold both and see for myself...
The answers for these are: D40(x), and XT(i)
1. What camera model will last me longer? What I am pretty much asking is what camera will I be happy with without having to replace to upgrade in a few years.(feature wise, build quality, etc...)
2. Which company has a bigger more compatible lens line?
3. If I was to ask one question to aid me in purchasing a DSLR, what would that question be?
And thats all can think to ask early in the morning...Cheers!
The Nikon's plastic feels a bit sturdier to me on the low-end models, but if you don't abuse it, they should have pretty equivalent life-spans. The other bodies are all comparable outside significant abuse.
I think Canon has more overall lenses, though Nikon retains compatibility further back (lens mount hasn't changed since the '50s, some older lenses protrude too far for the mirror, but Canon changed mounts in the '80s I think.) Canon has more tilt/shift lenses for serious architecture, Nikon tends to have more interesting zooms and Superzooms (IMO.) Coverage-wise I don't think there's a huge difference, though Nikon does offer one additional teleconverter (1.7x.) Canon's 400/2.8 and 600/4 lenses are significantly cheaper than Nikons, so if you're going to shoot birds, Canon's the cost-effective answer. For other focal lengths, it depends on the lens.
Nikon's flash system is better, especially with multiple flashes in settings where IR triggers will work. I prefer studio strobes in those conditions, but many find the Nikon Creative Lighting System just fine for their needs.
Overall, if you don't have a particular photographic focus, you really are best served going somewhere that has the Rebel and 40D and the D40 and D80- handle all four, decide if there's an ergonomic difference brand-wise that you prefer. For birds or architecture where you're going to spend thousands on lenses, Canon wins.
For me, the 1.7x TC is as much TC as I'll accept, despite shooting one of the sharpest lenses in Nikon's lineup. So the ability to get what I consider to be acceptable shots beyond a 1.4x TC is significant. That allows my 400/2.8 to become a either a 560/4 or 680/5.6 and still get results that are in my acceptable zone- that's not a big deal for most photographers, and few photographers *will* carry a 400/2.8 plus enough other gear to get to about 45lbs in the field all day. When I shoot nature somewhere there's a mix of Canon and Nikon shooters, nobody ends up with too much difference in the results other than in terms of experience or lucky shots.