I try to keep an old bowled back guitar tuned in DADF#AD and it really is a relaxing lay around kind of guitar time. I highly recomend "Hawaiian Slack Key Guitar MASTERS" Instrumental collection on Dancing Cat records 08022-38032-2 on CD.
I have slid a nut adaptor over the nut to raise the strings so I can play it with a heavy bar but that gets you back to the Dobro style.
Mudjack