My ISP (Andrews&Arnold, UK) offer IPv6, so I have a /48 and (since I bought a new modem recently) all my machines are now natively IPv6 with no tunnelling involved. (A&A also support tunnelling if your modem/router is IPv4 only.)
Excellent. I currently use a local ISP, because it's the only way I can get a decent speed where I live (there's a local FTTC network called Digital Region).
But I'm likely to be moving out of their coverage area at some point, so I'll add this to my list to consider when I do. Thanks!