Oral-B has announced a July launch for the latest addition to its iO electric toothbrush line. With a recommended retail price of $59.94 in the US (but no launch date or UK price yet publicised), the iO Series 2 will be its most budget-friendly yet. If you’re in the US, you can pre-order the iO2 starter kit (which contains an extra brush head) from Amazon now for $65.99. Here’s why I’m looking forward to its release. In my opinion, Oral-B’s iO line offers the best brushing performance around and I regularly recommend these brushes to friends. But for people who aren’t sold on the advanced feat…