Roy C
Occasional bird snapper
Sounds good, I have often wondered why Canon do not make something like a little 2.5x crop Camera. I used to have a SX50 which is a 5.6 crop with 1200mm 'reach' and IQ is almost usable - even something twice as big but with the same 1200mm 'reach' and a bigger sensor would be very lightweight. Perhaps it would encroach on their DSLR market too much!!!Also worth checking out the emerging reviews of the Nikon 1 V3, which allegedly has the character of a DSLR but in a small, lightweight body, and with pretty good image quality. You can use a nikon DSLR lens on it (with nikon's ft-1 adapter) and the 2.7x crop factor gives you an effective 810mm if using a 300mm lens.
Nikon are also launching a purpose-built Nikon 1 series 70-300mm lens that will have an effective focal range of 189-810mm. It remains to be seen how good that is, but it will be a tiny package (lens weighs under 600 grams!) so might be ideal for travelling.