I am in the market to buy a digital camera to support my new photography hobby.  I currently own a very old Canon AE-1 Program that I started to use to learn photography.  I feel I could learn faster with a digital camera because I can see my pictures a bit quicker because I am not constrained by developing the film.  Currently I have to write how I took the shot down, the date/time, the conditions etc... and once I get the pictures back I can look at how I can improve that shot.  For me thats just to slow, so I figure a digital would be better in that sense.  So with that... here are the cameras I am looking at and I would like some recommendations on alternatives and comments/suggestions on these two models.

Canon EOS Digital Rebel XSi

Nikon D60

The second items is I would like to purchase some digital photography software. I currently own Adobe CS3 Suite, so I already have Photoshop, but I looked over both Aperature and Lightroom and am trying to decide which one I want to buy.  I am still learning Photoshop to be honest, for design stuff for the web I usually just use Fireworks.  I know there are some work flow advantages by going with Lightroom, but is it better than Aperature?

I look forward to your suggestions!