Change price by attribute set to lowest option

[joerubes]

I have a music book that I am offering by 'hard copy (£7.50)' or download (£6).
I have set a drop down box to select either option.

I have two questions:
1. can I change the price shown to the higher of the two prices?
2. Is there any way I can turn the quantity box off when the download option is chosen so the buyer can just purchase one?

Thanks

[Ajeh]

You can change the price by clicking on the Attribute you don't want used in calculating the Base Price and click the setting for NO:

Include in Base Price
When Priced by Attributes