Check out the consumer line of dslr's like the canon xti or t3i (I don't know the nikon equivalent). They are not as large as you might think. But a bridge camera will be lighter and easier to use in auto mode. Heck, there are some really nice P&S cameras available now so don't count that out. But in my opinion, a dslr is for someone who wants to learn photography and is willing to put time and effort into it. That includes carrying around a larger camera and larger lens(es, lights, filters, light mods, tripod, stands, batteries....). Simply having a dslr is not going to make your photos any better than your P&S.