The majority of the bently brushes are flocked bristles, if you prefer the monofilament (the new Vikan) you could try the Addis or both for that matter. They are both cheap £1.49 and £2.99. I like the way the addis bristles splay and give allowing you to "cut" up to the edge of the frame. They do wear very, very, well.
They will take you some time to become accustomed to them compared to whatever you are using now. But they are light and the leverage is a lot less at 45 degrees