I had a kaffenback and a change of wheelset made a huge difference to the feel of the bike. However, I don’t think its going to get you where you want to get to.
If you dont have a requirement for mudguards and discs (and I did) – then I would use the summer bike or get the PX London road or something, which should be a lot lighter and feel nipper.
The genesis range is quite nice as well, and run more road based geometry so will feel nicer.