Media72 are a very impressive, new (to hosting) UK based (although not servers at the mo') company. I'd go with them for the RoR support, but they don't have Webdav access. Yet. However, OCS Solutions seem top notch in everything they offer, so I think I'm off there for the time being. Just a few queries to go before I make the leap, although I'm not doing any yearly plan things again.