The Vida is £3,300.00 I think (I’ve not heard the newer £1,000.00 design). The Paradise is an oddball because it isn’t a commercial design as such, it was originally a group buy kit from the DIY Audio forum. As such there are a limited number in existence and you can’t just order one (it’s also far from being an easy kit to build). Having said that, pfm forum member sq225917 has built quite a number of them and I think they come out at around £2,500.00 - but it could be more (it also depends what specification build you want). So, in short, the Vida and the Paradise are not in the same price bracket as the Arkless, Dynavector and RSL.
Oh, I’ve also been loaned the Arkless (CA620p), though this was a long time ago, and it was very good indeed.