I bought a pair of boots that came with Ed Visturs heat moldable insoles - really fit well after baking them (I've done that to ski boot liners before, but this was a first for a hiking boot - takes only 5 minutes but did make a huge difference in fit and feel)

http://www.advancedfootorthotics.com/Ordersole_EV.htm

expensive - doubt I'd buy the before the stock insoles are shot, as I never really had issues with those either until they are flattened from hundreds of miles of pounding.