Grateful thanks to all who have replied and I conclude that:
1. there are good, comfortable, fast alu framed bikes
2. there are good, comfortable, fast steel framed bikes
3. steel frames are a bit heavier - but probably not much more than a couple of bacon sarnies (or their effect
) difference
4. alu frames can be broken
5. steel frames can be broken
6. "if you want comfort, ride decent tyres and saddles, sort your ideal position out and forget about magical metal"
7. it's a personal thing
8. it can be a contentious subject
9. there's a LOT of experience and advice on CC
Thanks again