Thank you both

Excellent comments which i shall deffinately follow up.
With reference to the "Purely Manual" thing - I have enormous trouble using Autofocus when i'm doing macro work so i guess that'll be no hardship as i will probably be doing everything manually? I may try to get hold of the tubes that come in 3 steps then add one at a time and see what sort of quality i get or if it even works.
Having looked at those reviews i may have to look into that Raynox kit - looks rather good at a fraction of the price.
If all else fails i'll just have to sweet talk the other half for 4 more months until christmas.
Thank you guys!
Grant