I'm with you on 2 of those points;
I always try to buy stuff that is not chill-filtered and not coloured.
And I never really (well, only a few exceptions) buy stuff at 40% - i feel it's a cop out from the distillery with little thought being put it to the end result so they can churn out more whisky to the mass market.
The only thing with IB stuff, some of it is cracking but there are rotters out there too. It's like playing with dynamite, you never know what you're going to get and it may blow up.
I picked up a BBR bottling of a 37yo Glen Grant, full cask strength NCF and natural colour for £135. You try to find a 37yo for that price from an OB! .....but I new it was good as it was highly rated by several independant "experts"....so IB's are good, but make sure you do your homework.