for your needs, these V2's would be really nice. They have a carbon shaft so they don't buzz so much on the pavement and make your feet numb, they can be equipped with both a brake and speed reducers and you can buy slower wheels from v2 Jenex or Rollerski shop online.
https://nordicskater.com/...ariant=8193916993626
The V2 150 size pneumatic are an OK option and probably the best for speed control, but they are a bit fast rolling and heavy.
https://nordicskater.com/...riant=12115449282650
Most of the other speed reducers are not very good. Many people use the Marwe without reducers and rely on the slow wheels and careful; selection of course. It's a very nice riding ski, but no speed control
http://finnsisu.com/...620xc-rollerski.html
Anything with a wide wheel will have a fast wearing and expensive wheel, e.g. a "combi" ski, best to avoid
Don't forget to buy some carbide pole tips, have fun out there it's great exercise
https://nordicskater.com/...ariant=8193916993626
The V2 150 size pneumatic are an OK option and probably the best for speed control, but they are a bit fast rolling and heavy.
https://nordicskater.com/...riant=12115449282650
Most of the other speed reducers are not very good. Many people use the Marwe without reducers and rely on the slow wheels and careful; selection of course. It's a very nice riding ski, but no speed control
http://finnsisu.com/...620xc-rollerski.html
Anything with a wide wheel will have a fast wearing and expensive wheel, e.g. a "combi" ski, best to avoid
Don't forget to buy some carbide pole tips, have fun out there it's great exercise