I have an Oneida Dust Gorilla system in the woodshop, and I love it. I made two additions to it: the laser sensor, to let me know when the bin was full, and the vacuum sensor to tell me when to blow out the filter.
Not cheap, but worth it. I got sick of forgetting to empty the collection barrel in time, which I would do on a regular basis. Then, when I finally noticed the machine wasn't drawing, I had to deal with sawdust all over the floor and backed up into the system. Since I put in the laser, I haven't screwed up once!
I have to say, though, those self-cleaning blast gates look mighty nice, especially for the table saw. I have to take that one apart and clean it every now and then.