ecommerce add-on + Sage Pay

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Hi there,

Urgently trying to establish whether the 'ecommerce' add-on allows Customer Group Discounts. By this I mean that when a customer logs on they see their pricing across all products not just at the checkout.

I currently have a Volusion sitehttp://www.chairtrader.co.uk but have been building a concrete5 version with Shop and ecommerce forhttp://www.chairtrader.co.uk to improve the 'design' element. I also need the UK Sage Pay gateway. This all seems possible with Shopify - should I have gone with that instead of ecommerce?

Any suggestions or ideas most welcome,

Thannks,

David