El Gull, If I was going to buy a guitar to purposefully leave out all the time as a practice/lounge guitar, I'd have to go with the guitar I thought was the most structurally stable, or at least had that quality as one of the many things I liked about it.
This of course, depends on your environment. For me, if it's not all laminate, it has to get taken care of and babied (meaning always in case when not in use and humidified etc).
The only guitar I've had that was a tank and did not need this was my old all-lam Takamine and hopefully, now my Alvarez RD27.
Man, I tell you, that old Takamine I had was truly something. Had it for about 10 years, it was never in it's case unless traveling with it, endured 10 years of 4 seasons worth of extreme environment change and it was as rock solid straight and stable the day I sold it as it was when I bought it. As far as "structurally stable" goes, that old Tak was one of the most impressive guitars I've ever had.
If I had kids, that old Takamine would have gone to them I'm sure. Good memories. What were we talking about again?
===================================== One Alvarez in the hand is worth two Taylors and a Martin in the guitar store!