what cologne should I get my boyfriend?

hi guys, hope yall can help me with some ideas. my boyfriends birthday is coming up and he’s mentioned he wants to start trying new colognes. right now the ones he has are dior sauvage, versace eros (which is his favorite). and spicebomb. the cologne sampler from sephora is sold out which is what I was gonna get him. should I get him a couple travel sizes of different scents or just one big bottle? some scents I was considering were replica jazz club, bad boy by carolina herrera, Ysl MYSLF, Valentino Uomo, or Givenchy Gentleman Boisée. I would ideally like to stay under $100 since i already got him other gifts for his birthday as well