I got this one
http://www.amazon.co.uk/iSmart-Mobile-Windscreen-Smartphones-Recommended/dp/B007QTURZG/ref=pd_ys_iyr3 when I bought the case!...
It's in the car at the moment, I'm unsure how stable it is (not tested on a journey yet!), I'll get back, with photies, once I've tested it!!
(plus I got it at about £1 less than it's currently up for!!)
Got a few pics...
Sorry about the 'Blue Hue' to the pics, I was sat in a cold damp carpark yesterday morning waiting for Toy's R Us to open... only had the N4 with me, hence no 'in-situe' photos!!! (I'll get some up later!!
)
The cradle it's self though!!! Very stable!, I've used it a couple of times, too and from work (75 miles each way!) and it's rock solid!! I thought a couple of nasty pot holes on the M4 might dis-lodge it, but it stayed nice a stable!!, it's a nice height too, in that position, it doesn't protrude into my line of sight like my previous cradle (custom one made for my old Xperia Arc).
It does come with a 'Dashboard Disc' from 3M, but the one in the pic is a Garmin one I already had!!
Very recommended and only 1/3 the price of the OSO Spacemount!