Webshop for online custom product builder

Hi guys,

I'm a front-end dev, but I have 0 experience with ecommerce.
I have a product editor, something similar to this (withouth the shopping functionality):
http://n-e-r-v-o-u-s.com/cellCycle/

and I'd like to add the same kind of shopping features to it: it's just one product, but it has customizable attributes that determine the price (it's quite an easy logic, but there can be infinite number of possibilities for the attributes).

I'm here to ask: do you think opencart would be a good tool for the job, wouldn't it be overkill? Is there any other solution you would suggest?
Also, if there's someone who has experience with this, I'd be interested to pass this on to him (paid of course).

thanks,
Andrew