The Big Baby Taylor is not quite full size, (I think it's 15 16ths size) so it may be convenient to play, but I hate the sound.

The Lowden has a particular sound, and although I like the Gibsons just as well, their sound is very different. I think I would say to go for the sound above all.

There are a lot of 24 7/8 scales out there - one of my favourites is my Mugen (think "Daion") THE '78 which has that length, and quite a few Martin clones use it too (although for example a Martin OM1 is 25 1/2). It also has a big boom that suits open tunings, with some suggestions of the Lowden "big bell". You will get one without huge expense if you lurk ebay (worldwide) looking for a Daion Mugen or Yamaki THE '78.