Thinline all the way. Agree with the comments above re the thinner neck profile being more comfortable for you and the 15/15s pups with their midrange bump sounding awesome in the Thinline. I love love love mine, and the Carvin hasn't seen the light of day since Cherry Bomb arrived at my home. P.S. - I'm one of the poor mofos on this site that only owns two guitars, but so be it. That PRS 594 Thinline puts a huge smile on my face every time I crack the case open, and I know I lucked out on the gorgeous detailed grain that glows thru the beautiful Vintage Cherry finish. When I picked mine up at GC after my order arrived, I was totally surprised when I unboxed it there and saw how it popped. Send us pics of yours (whichever one you choose) when she arrives.