I have a couple of spare Brooks B17S I am happy to loan for you to try before you buy.
I don't like them on a solo, I stick with whatever any new bike came with. I used to fret and try loads but came to the conclusion they're all equally rubbish so now I save my money. I'm fat, and until I'm much much thinner that's always a bigger issue than the shape of the thing I park my lardy arse on.
PM if you want to try. They're heavy, so I'm afraid you'll probably have to cover the postage, unless I happen to be in the right place soonish.