MrsMac5 - I think time/distance from the nearest hospital is a concern, is the 2 hours allowing for normal traffic conditions? If it is, bear in mind that if you were in an ambulance with blue lights (i.e being transferred because the baby was in distress etc) this time would be significantly reduced as you would go through traffic lights and past other cars etc.
Our nearest hospital is 16 miles away and in the car takes us just over 30 mins, but our MW says with blue lights it usually takes 15 mins from our area to the hospital by ambulance. Also, when you're at home the MWs have an ambulance on standby for you who are aware of your location etc so it take a minimal time for them to arrive to collect you (I assume this is the same at a birthing centre)
Ask your MW for some advice about journey times.
Ultimately, the mosty important thing is the safety of you and your baby, and although we may have idealistic ideas of how birth will be for us, I am keeping an open mind as when it comes down to it, I wont care what has to be done or where I end up giving birth as long as my babys ok.
You will know what feels right for you Im sure when the time comes. Remember, you can change your mind at the last minute if you choose home/birthing centre and go into hospital, but if you go straight to hospital you are less likely to be able to then go to the birthing centre instead.
Good Luck
x