Hello Srodd14,
Happy to help, if I can. I did not flash the BIOS. At the time of my build (and I believe currently), the F5 BIOS for this board was in Beta stage and therefore not recommended by most for use with the hack. Check the Gigabyte website when your board comes in to confirm if it's still in Beta. If so, then I wouldn't bother to flash the BIOS. I haven't run into any major issues since I successfully completed the install nearly a month ago... just a few minor hiccups here and there, but nothing catastrophic. I haven't attempted any overclocking, so I can't speak to how well the chip performs there without flashing the BIOS, but it's running at 4.4ghz and that's just fine for me at the moment.
Also, I never successfully got the on-board WIFI and BT working, but then again, I didn't put that much effort into it. There's plenty of posts out there that detail how this can be accomplished, so check them out if you're determined to get these going. I just went ahead and picked up a WIFI card and BT dongle and they've worked well enough. I hope this helps out a bit. Cheers and good luck to ya.