For the amount of use I give them, the H&H filters are just fine. Yes, I agree they have a "not manufactured by machine" look, but there is no doubt that they do what they are supposed to and the prices beat the big boys by alot, so they are a good value. Maybe future DSLR's will have a live LCD, my old Coolpix 950 did and all I had to do was put the filter on. I could aim with the lcd, it would af, too!
That little camera is probably the most convenient IR machine around, too bad it's so underpowered for today's image expectations. There a web page that tells you how to replace the internal IR blocking filter in the 950 here: http://www.parsel.abe.msstate.edu/james/camera/lense.html
I've got to make time for this project.