cloud based accounting software

I am looking to get a cloud based accounting software. I own a successful bookkeeping company in dublin & I am frequently asked about providing an online solutions. This needs to include sales ledger, purchases ledger, P & L, Trial balance to start with.. Would need standard reports like aged creditors & debtors. I have much much much bigger plans but if I can get it started at this level it lets me know if it is worth my while looking more into it.