These have gone up in price somewhat since 2012, I purchased this one for £239.00 http://www.ukhs.tv/W...WP-150psi-10BAR
If you can go for the 150L it would be much better but I am not sure I would pay £399.00 for it now. Reason, the on-off pressure switch has broken but an easy bodge fixed that at no cost, the head gasket buggered last year at a cost to replace of £35.00 plus my time to sort out and I did have a 3 week wait for a head gasket. I would buy another at £239.00 but at £399.00??, I might want to pay extra again and get a machine mart one for around £500 BUT I have no experience of machine mart/clark quality, perhaps at these prices they are all much the same.
To be honest I was annoyed as I have used it very little, but it does perform very well. It seems they all arrive with the pressure switch set to stop and around 90psi, I upped mine to 140psi ( under the 150psi it is rated at) so maybe it should have been left at 90psi.You can spray paint easy with this, it has run a sand blaster and all tools I have thrown at it.
Hope that helps, by the way if you see an old compressor to buy you could plumb in that tank to the one you are looking at to increase tank size at little extra cost.