Need to get a tablet for work/play. The work stuff I do is mostly excel and internet. I am eyeing either the ipad air or the surface 2 rt. the obvious choice may not be so clear since the ipad now comes with their spreadsheet app which is compatible with excel. I don't need so much memory since spreadsheets are minimal in size and I pull them off the cloud. The surface seems great...on the surface. But with lack of apps, a buggy OS and general market displeasure with Microsoft hardware I am apt to lean towards ipad. But I like the hardwired keyboard feature of the surface. Does anyone know if there is any latency or lag with using a Bluetooth keyboard with iPads? Since any tablet I buy would go along with a keyboard/cover. Any thoughts would be most helpful.