Security is not that much of a problem, because it's just 3 of us and everyone has a stake in business. I've heard good things about Canon's reliability too, heard it's supposed to be easy to set up.
Not so sure about HP one though, in a way this fancy touch screen + ability to run apps seems cool and might really be useful, on other hand it might just be crap. I am just worried I will be able to set up everything right. I like that it also has a single pass duplex scan.
I've decided that just in case I will buy extra warranty (yeah shop one) which would cost me 45€ for warranty extension from 1 to 5 years and it covers all repair during that period which I think is not a bad deal (HP care pack costs like 200€ for 2 extra years of warranty)
I've checked Okidata's and they seem pretty good, but unfortunately I couldn't find any reliable store here (Slovenia) that sells them, same with retail.