My suggestions...
...in alphabetical order:
1) Beretta 92fs Inox. Have one. The Italians are the best designers, from an appearance standpoint, in the world. DA/SA. Until I got the SA 1911 9mm, the most accurate pistol I owned. Reasonably priced and an excellent value.
2) Browning Hi Power. Have one. Timeless design. SA only. Very accurate. Large capacity mags readily available. Hold their value well.
3) Sig P210. Want on. Another timeless design. Old world craftsmanship. SA only. Legendary accuracy. Very expensive and relatively rare.
4) Springfield Armory M1911A1 9mm. Just got one. Another John Browning design-'nuff said. SA only. A high quality, good looking, well finished and appointed firearm. The most accurate pistol in my collection. I really enjoy shooting this thing.
5) Walther P88. My next purchase. Very good looking, IMO, in a utilitarian way. DA/SA. Reputedly, the highest quality production 9mm ever made. Accuracy on a par w/ the P210. Very expensive when new, and still so. Very rare.
I don't think you can go wrong with any of the above.