Create accounts from spreadsheets

We have kept records in spreadsheets since 2009 with accounts managed externally by a book keeping firm. We have decided it would be better to have our own charter of accounts from spreadsheets just need someone to do this. Interested in most accounts packages but Sage are internationally recognized with Simply, Peachtree and Line 50, basically all the same product with a different name for US UK and Canadian markets. We have also looked at online solutions like Freshbooks, Xero and Saasu (the only one with inventory). Our aim is to be able to produce reports that we are currently unable to do. A moderate task, wondered if anyone might be interested. Considerable experience with building a charter of accounts is required.