not sure you can ever pin point a heartland.
cost comparison is interesting - what kind of grids are there at the two mentioned? T
BH if I were local to Mallory, or Anglesey, or a track which has a series centered on it (Knockhill I think also does that) I would probably be racing part of that - not sure if instead of DD tho as the level playing feild (ish

) makes it far more interesting
but thats because I am now a racer - I would not have done that as a fisrt step; DD has given me that already
still say keep it simple: as it is right now