I'm new to tablet computing and I'm looking at buying one of 4 different tablets: Sero 7 Pro with 8GB, Acer Iconia 8GB A1-810-L615 Tablet, Asus ME-102 Memo Pad with 16GB, Dell Venue 8 with 8 GB of memory. These are all Android tablets. I have no interest in a tablet running Windows and I can't...