wonder lander, please visit a shop & see how important liveview is to you (& specifically Sony's implementation as it's different from CaNikon & in some ways it's better & in others worse).
For me & my usage I could do without it but it may be just what you want.
There is an A200 twin lens kit with the 18-70mm & 75-300mm which you can get for £500 if you look.
Now these are typical kit lenses in that they are adequate rather than brilliant - however, your budget doesn't atm stretch to doing everything well but these would give you a good coverage as I would think that you need 300mm for motorsport.
Or you could buy the body & kit 18-70 (~£340) & choose another tele zoom (either new or sh) from someone like Sigma or Tamron with the rest.
Also allow for things like a bag, cleaning kit & some compact flash plus a tripod & flash if you think that you need them right away.
With the A350 there seems to be a kit with the 18-70mm & the 55-200mm which can come in under £700.
Now that doesn't give you as much reach as the 75-300mm but the 55-200mm performs above it's price level in image quality.
& at least 1 retailer does the A350 with the 18-250mm for under £700 - it's a very good walkaround lens (much better than the older 18-200mm, don't buy that) but does so at it's price level by not being a "fast" lens in terms of max. aperture.
In the consumer marketplace there are more than enough available lenses to satisfy enthusiasts let alone the average person.
Yes, there are areas where there are gaps (also true of Canikon albeit not so much) but Sony are adding at a rapid rate (something like another 5 lenses expected this year) as are both Sigma & Tamron.
The 2 weak areas atm are in things like T&S/PC & ultra tele primes but those are for professionals or very well heeled individuals (& I would stake money on the old Minolta ultra tele primes being reintroduced or replaced in improved form with SSM).
