I'm looking to pick up my first SLR in the coming weeks and I have a question. My father has been looking to upgrade from his D70 for quite some time now (likely to a D300), and so if that were to happen I'd likely inherit the D70. I know I would be perfectly happy with the D70 as it is a great camera, but I was weighing the pros and cons of the D70 vs. a D40 (if I were able to trade one for the other). I'd likely take the camera on an upcoming trip to South America this summer, and so the D40 appeals to me due to the slightly smaller size and the larger LCD (both of which would be nice if I were traveling) so from that point of view I like the D40. The con with the D40 is the inability to use older non AF-S lenses, which limits some very nice options (the 50mm f/1.8 nikkor seems to be a prime example of this). I haven't ever seen both of them side by side in real life, but which camera do you guys think would make a better choice? I think I'd lean towards just keeping the D70, but is there anything I'm leaving out that may make decision an easier one to make? Is the size too insignificant to make a difference? Thanks for your advice.