Is it too late to cancel the order?
As @mlga91 says, it's really difficult to know what BIOS versions boards ship with, and you don't want to be in a situation where you're having to find/beg/borrow/buy a Skylake CPU.
Rather than the more expensive H270 board, I'd suggest the cheaper B250 chipset. It has everything most people need and starts around $20 less than the H270 boards.
If you can cancel the order too, consider paying $10 more for the i5 7500. The 7400 is clocked quite a bit lower. If you can't cancel, don't worry - the i5 7400 is still a decent CPU, just worth the extra $10 if you can.