Hi, I have a question regarding telephoto lens. i use a f-75 nikon slr with a 28-80 and a 70-300 mm. for wildlife i often tend to feel the lack of a 400m or 600mm. now i dont have the required financial strength to buy a 400 or 600mm tele lens. alternatively i had an idea of buying one of those new compact cameras by cannon / nikon (10-12mp) which have one zoom lens of 30-600 types. i just want to know would dis be a gd idea? are these lenses any good? pls let me know.