LG VX-8600 / AX-8600

Ok so I am debating between the 8300 and the 8600. I like the idea of the new slick phone but am a bit wary of the durability of the 8600. However I have heard that you can't talk and charge at the same time. This would be a make or break issue. I often realize I am out of battery while on the phone and plug it in while talking. If all those who own the phone could let me know I'd really appreciate it. Also any feedback on durability would be a bonus! 😁