Utterly pointless, massively expensive but do I want one?! If I had the money I would happily get one but I wouldn't bust a gut saving!..
I've been looking at the differences between the 6150 and the 6250 and couldn't see anything significant. Particularly as the 6150 is now only £99. Most importantly the print engine is the same.
I went to John Lewis (department store for those not in the UK) to pick one up so imagine my joy when I saw they were doing the 8150 for £99. Even better, the only one they had in Sheffield was the display one so picked up an 8150 with 12 month warranty, all the inks etc for £75.