Salaadin, you should be fine on all counts. I particularly find your question about resolutions hilarious
If a monitor/graphics card can do the MAXIMUM resolution you want, you can do every resolution lower than that with no problems and a performance boost in games.
If the motherboard truly has NO onboard video, then you won't even have a place to plug in a VGA cable to your monitor, so your question is nullified. You won't be able to
see the bios
Moving a hard drive is among the easiest things to do internally with a PC. You most likely wouldn't have to literally remove a bay, just move the HDD from one to another (I had to do this with my GTX260). Typically antec's bays are fixed to the frame of the case so removing it isn't really a viable option anyway, but it's not at all likely that you'd need to do that. And since you're putting it together from scratch (right?) you can see where you're going to put the GFX card, and strategically put your HDD somewhere that obviously won't get in its way.