I've been using an ultrathin Dun Wallet (https://dunwallets.com/) in gun metal (less showy than silver) and really like it. It's a good compromise between wallet & card case. Only 4 slots for cards, of which I'm only using 2 (drivers license & 1 cc; other ccs are stored on phone) and a strap (not separate pocket) for bills in the very rare cases I carry them. While not as luxurious feeling as higher-end leather the very thinness makes it feel special. I was recently in Germany (more cash dependent, less cc) and it worked just fine with 5-8 bills. That said, now that I'm back home it's much nicer not carrying cash!