Lots of different "voices " to talk about here. If I just take one instroment for slide say on a plane ... I usually cary out a newer LOO Gibson "blues_king "that has a lot of high end . National resoniphonic has put out a great batch of metal and wood boded resonated boxes. I got one of my son's a wooden bodied guitar from them that is very very versatile .. For certain styles of slide i use an archtop KAY Professional from the late 1930's that just cant be beat.It has a very upfront presence .. i also use a Kallamazoo that uses lighter strings but just dose anything .THe harder you attack it the more it gives. Majic... On stage I use a diolian national steel from the ealy 30's and that has a wonderful baraatone voice. I often say it has the sound of a 1949 doge powerwagon ! Sorry different voices for different attacks. I guess i would start with the National Wooden REsonaphonic . great guitar and very resaleable if it dose not fit.. By the way different tunings do better on each of the above . All the best , Guy