Vertuo equivalents? Shanghai and Stockholm Lungo

I have an OL Nespresso machine and generally drink 2-3 Shanghai Lungo or Stockholm Lungo per day. Considering the Vertuo machine as there is a very good deal for Vertuo Pop + frother + capsules, and also the online reward store has many more Vertuo options than OL options, meaning that the cost would be offset by the free capsules - and by hopefully drinking 1-2 a day rather than 2-3. But I've never been that impressed by Vertuo coffee in the store. What capsules should I be choosing for something like Shanghai/Stockholm? I don't mind a somewhat longer drink - I've been running 1.5 lungo amounts through the OL capsules. But I have found the Vertuo coffee a bit bitter in the store. I always drink my coffee black with no sugar, exactly how it comes out of the machine. Not into cold coffee, flavours or anything like that. Just want a nice mug of well rounded strong tasty black coffee. Thanks!