Rewrite a customer welcome letter

We currently have a new customer welcome letter but we feel that it's a little bit dull and we want it to be more engaging. But importantly we want it to feel genuine and not contrived. We genuinely care about our customers and only want to offer the best range and quality artworks for their interiors and our customer service is what separates us from other art suppliers.

We don't like a hard sell approach but we also need this letter to encourage them to purchase from us.

A quick turnaround is also required.