Sue, Just had a peek at your 55-300 stream. As you say, surprisingly sharp. Is it the DA-L ED or the DA-ED?
Very impressed with the clarity and colours. I think I'll set my K5 to natural when it finally turns up. And perhaps save up for this 55-300 - I currently have a couple of Tamrons that go to 300, but the 28-300 is so soft at the long end it's practically unusable; the 70-300 is not much better.
Eyeayen - I borrowed a Canon 500D for a week in the summer. I couldn't find anything I wanted in the (to me) horrifically illogical and confusing menus, so ended up using it on auto most of the time

The main problem I had with is was the multipoint focusing - it would often focus on something I wasn't interested in and I could for the life of me work out how to switch to spot focusing - I'm not even sure if it has that feature.