Product Catalogue Management

Looking for someone to manage a product catalogue of 600-800 products.
Data in excel file and currently being converted into various CSV files for uploads to our e-commerce website, ebay, amazon etc etc.

Looking for on-going support to either:
- manage numerous current excel/csv files;
- convert into an easy to use data base that churns out the right files for uploading to various market places; or
- suggest an alternative better way of doing things

Needs to be easy to use and manage for bulk data entry - eg copy and pasting content which you can do in excel, rather than entering into a form or entry page item by item. [hopefully this makes sense].

I current use Linnwork to synch inventory across my channels including a 2 magento websites.

This is open for doing things in a different better and more efficient way.

On going work will include new products and changes to listing - e.g. prices, offers etc on a monthly basis for the sites.

Please respond with any experience you have of this.