Convertible Car Seat Recommendations

My son is 7 months old and 28 inches so I am looking into convertible seat options. He's currently in a Graco Infant seat and I'm not a fan. So the idea of switching to another Graco seat doesn't make me too happy. But spending $400 on a seat that doesn't even turn into a booster also sucks. We are expecting him to be on the taller side so. I'm trying to get the most for my money. Anyone have experience with any of these seats?

Britax Advocate click tight

Graco Extend2Fit

Graco TrioGrow 3-in-1

My daughter is riding in a Britax One4Life which we love, but it won't fit behind my husbands seat. Trying to plan for baby to grow out of the infant seat before we buy a new car that will fit the One4Life.