You need to be a registered member of Barbel Fishing World to post on these forums. Some of the forums are hidden from non-members. Please refer to the instructions on the ‘Register’ page for details of how to join the new incarnation of BFW...
I can recommend the Cadence 3# feeder. I use mine primarily for maggot/ castor fishing with blackcaps 30-50gm, 6 lb line for chub.
Not too many big roach where I fish but plenty of big shy biting chub and with a 1.5 or 2 oz tip i get to see all the bites and still enough backbone in the rod to take control and keep them out the snags( in the right swim). I've also landed quite a few barbel on it but can be a lengthy affair compared to a dedicated barbel rod with more power and heavier line, but it will do it if you're patient and have a forgiving swim. I use a 13' as it suits what I do but I'm sure they do a range of lengths.From the sounds of it the big roach you catch are serendipitous so I think you need to have something that will give you a fighting chance with bigger barbel/ chub , but will allow a pleasant scrap with modest fish and the odd monster roach?
Just a shame you can't handle one in the tackle shop, so you're buying blind or trying a mates, but quality is excellent, it's more of how it feels for you.
My mate doesn't like mine as the blank isn't the thinnest and prefers the Acolyte which is another lovely rod but +£100 roughly.
As previously stated, more good rods than bad ones on the market at the moment for all budgets, so a nice problem to have.