Ideally, kiddo should still be
rear-facing because he is 5 pounds away from the lowest
RF weight limit ... assuming there is about 1" between the top of his head & the edge of the shell/frame (my wesite explains in greater detail why it is so important to keep kids
RF for as long as possible).
The
Comfort Sport & Evenflo Triumph* are the 2 seats that kids outgrow the soonest. Most combination seats also don't keep kids harnessed as long as many
convertible seats + most combination seats pale in comparison to more dedicated boosters (when not using the harness: correct harnesses use is safer than
booster).
I would consider the
Recaro Como because it has the highest
RF &
FF limits of any
convertible (or combination harness) seat. Another option with a lower pricetag is the
Sunshine Kids Radian: save towards a dedicated
booster afterwards & have a CPST check your install

If you need to save $ the Cosco Apex might also be a good choice, but it's a very wide seat -- my daughter was swallowed up by it at 4 years old (also thin & tall) + it does require vehicle head support at least up to eye level.
Recaro has another good
FF only option, the Young Sport (mere 40# harness limit but with higher top harness slots than any of the other seats you mentioned as well as awesome side impact protection for
booster use) but it's expensive.
Compare the measurements of these seats & play with them at a Babies-R-Us or Buy Buy Baby, if possible, maybe letting kiddo make the final decision based on comfort once you know which ones you'll use correctly the easiest
*
the new Evenflo Triumph Advance fits much longer than the older version