Some interesting points there, thanks.
I had been looking at going uber niche and getting a fully rigid singlespeed 29er, but that might be a little too much to take on in one go – already got the beard!.
monkeychild – thanks for the offer but I'll be adding this to my christmas list so needs to be shop.
Looks like I'll be reading WMB in WHS over the next few days then and adding some chainring bolts to my list too :-)