Make sure you can live with your decision
I just bought my D90 at B&H and received fantastic service. Although I'm still waiting for it to come, it should be here by Tuesday. You're looking for a deal, but be careful stay away from companies that offer it at ridiculously low prices e.g.$500, because generally speaking they are scams. I had heard really nothing but praise about B&H, a lot of good stuff about Adorama and I had checked into Amazon. I had purchased "stuff" from Amazon before but when I noticed the D90 kept fluctuating in price while it sat in my wish list.
My decision to get the D90 was based on several things. While to more serious photographers they may not agree with my why, nonetheless, it played a part. The video feature. I take more photographs than video but with my Kodak DX7440, I took videos here and there. I knew I would miss it if I didn't have it, but I longed for a better camera and hoped to be able to keep the video feature. I could not afford a D300, D700 or a D3, while I would love to have one even without the video. I just didn't want to have to wait that long to afford one. So I got the best that I could live with, afford and still be able to purchase the lenses for it.
I do a lot of landscape photography and spent over a month researching what I thought I should get and afford. Coming to forums such as this was a great help. I am new to the DSLR and really had no clue, but I'm not a bad shot and some think I have a good eye when I'm not playing around. If it meant selling other "toys" to bump up the quality I was willing to do it, within reason of course. You will end up spending money, I know I ended spending more than I thought I would. There were the other essentials, tripod, camera bag, (a purse won't cut it like before, lol) extra charger, extra battery etc. I still want to get a battery grip and Capture NX2, that will have to wait; I'm out of money.
Now I'm rambling, if most of what you want is in both then go with the brand you like best. If there is something on one you can't or don't want to live with out, then get that. As in all electronics, as soon as you buy something, there will be something else you think is better etc. The point is, is to get out and take your pictures with a camera you can live with. If you are a few hundred dollars away from the one you really want, wait, if not, what are you waiting for, get the one you can live with that will suit your needs.
Just my .02 and my opinion right or wrong.