I have X-Flite barbel (1.5/2lb) and (original) Prodigy barbel (1.75lb). I like them well enough but they don't have the out and out grunt that some similarly rated rods have. I tend to use heavier rated rods than many would like because of this. I'd certainly not pay the full retail price of the X-Flite but at the price they have been seen discounted to, around £100, they are a reasonable buy. I wouldn't have Greys for fishing big rivers with big leads/feeders. They do cover pretty much every situation on my usual haunts on the Swale though.
If I'm playing out on the Trent I've used Korum Twin Tips until recently. They have only been defeated when attempting big chucks with big feeders. Something more specialised is required for that game which I've now got.
They make mincemeat of big casts with big feeders but many on here would be horrified just by mentioning the test curve.
P.S. Quiver tip sections seem like a good idea but if you are anything like me you'll find that you rarely use them and eventually stop taking them altogether.