Marcin, your worries and stressing out about the 2.0lb tc rods being too stiff etc. are a product of your previous match fishing background. The type of rods you were used to using for many years make barbel rods feel like monstrosities...bu they are not.
When I came into carp fishing after years of match/general coarse fishing, it was an even bigger step up...from float and quiver tips to a thing that looked like a broom handle in comparison. However, you soon appreciate their values and suitability for the job they were built for...and then they no longer seem over-gunned or like broom handles at all...quite the reverse in fact, on some occasions. Then, when I returned to the rivers for barbel fishing, the rods felt like weird floppy things...it's just the change, the different tools for different jobs that feel so odd at first.
Barbel rods are built somewhat differently, they have a softer tip to allow good bite detection...because that is what they are built to do. If I were you, and in view of the low number of times you will actually be using them for barbeling, I would go for the 2.0 and have done with it. They WILL do all you want, and more....and be good rods for all your needs for a very long time. It seems as though your circumstances mean that you can't borrow a mates rod and give it a try, so you don't have an easy answer that way.
As has been said, rods are a personal thing, with individuals preferring different qualities and actions, so no amount of advice is going to set your mind at rest. If you ask a hundred different anglers 'which rod is best for 'X' job, you will get a hundred different answers....I know, I have been there
. Take the plunge Marcin, and enjoy.
Cheers, Dave.