A strong point of Luton which is often missed is how much better for the Midlands it is than Stansted.
Bearing in mind lots of the thinner eastern routes will not all support BHX / EMA or even MAN and so travelling to London is a must - Luton is 40 minutes to an hour closer to Birmingham, Nottingham, Leicester etc.
Stansted holds the advantage for Norwich, Peterborough, Cambridge, much smaller cities.
Luton also has plentiful free parking in the town