I’m currently using two wetsuits from HUUB, the Archimedes II 3:5 and the HUUB AEGIS II 3:5 Sleeveless wetsuit. ( actually have a 4:4 as well but its getting sold as i dont get on with it)
I find that i swim much better with the AEGIS as it is less restrictive around the shoulders.
The Archimedes II wetsuit i have had from the beginning and as i have typical triathletes sinking legs i find the 3:5 gives me the right balance in the water and allows me to swim fast.
The fastest swim (as of the date of this post) that i’ve done is 28 mins, which i did in 2016.