Spot on DavidEB. Exactly what I thought.
Ok ... after all the research, great advice, and even a few snorts of derision, I have opted for the Sigma APO 70-300 Super II as a 'learning what the hell I'm doing' zoom. Bought one SH for £100 incl P&P, mint, from seller on another forum. Won't lose cash on it if I sell and I'll get several months of use until i head off on next Africa trip. Sorted
Longer term, I have researched and listened and decided (at least at the mo') to go for the Sigma 70-200 f2.8 HSM EX. This is a variation on cactusclay's recommendation. Great reviews, great sample shots, same price as Canon equivelent F4 L new, give or take, but F2.8 and includes tripod mount. Seems to be cheaper SH which is why I fancy it. Will get the Sigma extender too and already have the grip to give better balance with a heavier lens. If a bargain Canon 70-200 L + extender or 100-400 L came up I would also be happy to take it, of course.
Am also considering the Tamron SP 24-135 as a carry everywhere replacement for the kit lens. The extra zoom would make it really practical for around town shots where you don't want to be flashing big zooms around. We'll see how well the kit lens performs. Initial test shots indoors seem encouraging.
Anyway, 300D/Rebel finally arrived from US ebay seller this AM. No VAT/Duty
and the guy had even gift wrapped it so felt like Xmas! Total for camera and lens kit £310 and P&P/Insurance £35, which is a steal compared to the Joker who charges £80 P&P PLUS insurance. Lovely jubbly! Grip £70, Sigma zoom £100. Bargain city in my place today! A great camera, so one happy bunny! Seller is caller 'custom-tek' if anyone interested, tho' dunno if he has any left!
Thanks for all the help ... now, where's the decent weather?