Well I've just set up my Brother (MFC-J5910DW) and must have a faulty one as within 30 seconds of a head clean the head is blocked. Been on it all day and have got to admit defeat. Gone through around 100 sheets of paper (last 95 were normal paper). Never put the original carts in but got large refillable ones will have put the originals in when I take it back to PC World.
Just my flippin luck but still not going down the Ricoh route, cannot justify the cost for which is only really a standard inkjet/Gel printer.