I'm writing this with a tear in my eye as I'm finally moving on from my very first guitar...The neck is starting to warp and it just doesn't sound as good anymore. I've had it for....5 yrs? now and while it has withstood A LOT of abuse and two trips around the world, it's time to move on.
It's a standard Washburn D-100M and while I considered refurbishing and keeping it, I'd also like to upgrade to a better guitar. I'm looking at the $300-$500 price range, prefer to have an acoustic/electric with a built in tuner and something that produces a full, rich tone. I'm also planning to purchase some equipment to start recording on my computer so I assume an acoustic/electric is essential for that?
All that to say, I need some suggestions and recommendations for good acoustic types, models, etc. I bought the last one off of Ebay

got really lucky but would like to take a more educated approach this time around. Help anyone?
EDIT: I'm also interested in lifespan, durability and things like that because I subject my instrument to many trips and other non-advisable things so if anyone has an opinion or experience with that, I'd really appreciate it!