Design a web store for our products

I have just taken on the UK distribution rights to a range of existing products.

I need a webstore.

Once built, I would need to be able to access the store make changes, add/delete products, up load photos etc.

I use joomla on one of my existing companies, so something similar but better would be nice

I will host the site on my web space at uk2.net 100GB up there, unlimited databases etc

Website is needed ASAP