Gary,
I've said this loads of times to this question before and still maintain it. IMO the best 1.75lb tc rod is the Harrison Chimera Spec No.2. I can only say I've been using my pair for six years now and they have given me superb service despite being knocked about and covered in mud etc.
They have an awesome action which is a medium style and has loads of power in the butt. It's probably best termed as progressive. I use mine on every trip excepting when Im trotting, need a shorter rod, or in big floods (3m +).
You can still buy these rods for a substantive price but the other option is the Torrix which superceded the Chimera but retains a similar action albeit on a slimmer and lighter blank.
If I had to buy a new all round rod for barbel (and tenching) it would be the Chimera No2, despite all the newer models).
Just a personal opinion, but one I know is shared by other Chimeraists (!). Bob Gill will tell you what a good rod it is, but will also tell you the Torrix is better most probably due to the advances in technology
If you can get your hands on a Harrison blank, (new or second hand)you really wont be dissapointed I promise you. If I was forced to choose another make it would be Free Spirit, another excellent brand and reliable, unlike some of the stories you hear about other mass produced brands.
Best advice is to waggle as many as you can before spending any money. Thats what I did with Bob's Chimeras after some nightmares with the Insight brand.
Hope that helps
Tommo