HELP : advice needed!!!

We (retail chain with stores throghout London) are urgently looking for a Retail Solution with SAP Business One used as a back office. Our current provider let us down and we have to start all over again. Does any one know anything about retail front ends, Epos solutions? We are based in London (UK), but can consider provider from overseas.

Our requirements:

- Ready made, out of the box front end solution (tills)

- Sap Business One

- Integrated OLA chip & pin

Please advice