We use QuickBooks Online. As mentioned elsewhere in the thread, the new redesign is pretty slick and catches QuickBooks back up with Xero. In the US, you're going to find more accountants/bookkeepers that are familiar with QuickBooks over Xero...which is very important if you're not an accounting expert (most of us). That being said, Xero is working hard to woo those accountants in the US. I'd recommend doing a trial of both QuickBooks Online and Xero and seeing which one feels the best, syncs with your bank accounts, and saves you the most time.
