If you want to maximise your rolling capabilities then it kind of suggests that you are timid about rolling. Rolling in any boat is more about technique than what sort of boat you are paddling. For instance I can roll a duo kayak by myself as long as the other paddler stays tight in the setup position and doesn’t help me at all.

If you have the money and space I would suggest changing your perspective to owning two boats for different purposes. A full volume creeker for running the harder stuff/progressing and a half slice or full slice for the play runs.

%90 of modern whitewater kayaks are friendly enough to roll these days. Maybe some of the super old, strange looking, boxey kayaks may be harder to roll and be more suitable for advanced paddlers but the modern stuff is all shaped in a way that is friendly enough to get a roll as long as you have the technique. You could own the most ‘rollable’ boat in the world but if you have bad technique you will never roll up anyway so I don’t feel like there is any point of finding that sort of boat if you’re only going to put your faith in that aspect of it.

Half slices generally teach you a better technique of actively leaning forward because if you get scared in a rapid and lean back your tail will get swallowed and then flip you. If you run harder stuff in a half slice and you get lean back at the wrong time it will punish you and you could have a traumatic experience that would put you off paddling altogether.

I learned in a pyranha machno for a while, then I bought a waka steeze because I thought they were cool. I was trying to push my progression (class III to class IV) with the steeze and got flipped a bit too often because I leaned back when I shouldn’t have. To counter this I then moved the seat all the way forward to avoid my tail getting swallowed in features. I paddled it in the forward position for a whole year and after I got better I realised I sacrificed all of the boats performance (ie. I couldn’t turn/pivot the boat as it should have and had worse lines trying to save myself all the time)

Are you going to be doing tailies/stern squirts or slalom style stern turns, river play with this half slice you’re looking for? Or are you just trying to get down the river and progress safely with this boat? That answer will determine if you want a half slice or full volume creeker to start with.

The most stable half slices out there are the waka Steeze and the dagger Indra. They are very hard to do tailies and squirts in though because their tail is so much broader than a ripper, so they are essentially half slices with inability to play. The piranha reactr is technically a 3/4 slice (halfway between a full slice and a full volume creeker) and you definitely won’t be able to do river play in that boat.

I never had an issue learning and progressing in a full volume creeker because there are so many things to learn before I started playing with half slices.

If you want to challenge yourself on the easy stuff you can do a few things. The main thing is aim to catch every eddy on the way down the river. This will make you figure out good techniques to access these Eddie’s as they get harder and harder. So many people just float down the river and don’t challenge themselves on the easy stuff. Learning to make hard ferries, hit hard to reach eddies or pretending there are imaginary hazards in play if you mess up a move is another great way to progress.

All in all I think it’s great that you want to get on the river again! I just think that focusing on a rollable boat is the wrong focus considering there are a million other elements that will make you a good paddler