Can't you get dpf's from scrappies? or reconditioned ones (with warranty)?
I personally dont want to run my car without a dpf. Theres been a few documenteries about air pollution killing more people than drink and car crashes combined. Diesel soot is a massive air polluter/carcenogenic. I'm not saying that enthusiasts shouldn't be allowed to de-dpf, but there is another side to bear in mind and not everyone should be doing it.