Look at Rectilignes and see if you will fit on their size chart first. They are far less expensive than the Koenigs, and they have a slim ankle, which I personally really like. I've had mine for 18mos now and they are no worse for wear, except for some deterioration in the footbed which I need to get fixed. But yes, I like them far more than my Petries which if I didn't have a use for (yay unbroke horses that don't steer) I would burn in a fire.
I am a big fan of them, and they aren't super stiff, very well finished and comfortable. But they don't do custom, just ordering from their size charts, which is why they are so inexpensive.
After that I would go for Cavallo before Koenig, personally. And if you really want to splurge there is a custom boot company in Germany which I can't for the life of me remember the name of, but are the boots I would like to buy next. They are around $4000 for a custom pair, but fit like gloves and are far better finished than the Koenigs.
They say money doesn't buy happiness -- well happiness doesn't buy horses!