It really depends. With five kids, I have to keep getting them new stuff as they grow. My 13yo is bigger than me, so I've been getting him a nice starter set built up. He has an 870 12gauge and a model 700 in 243. If the next gun is for him, it will either be a used XD9 or a K/L frame S&W in 38/357.
However, if I get to take the 1911 transition course at work soon, mama said she'd buy me a new one for work since it would be a justifiable expense. I'm eyeballing a Les Baer Premier or an Ed Brown Special Forces. Good thing I got with a gal that makes way more than I do.