Megane II Purchase: Which engine and what is to be paid attention!?

Hey dear community! I’m looking for the right car for me at the moment. I’m currently heading towards Renault Megane II (Facelift). Since I’m looking for a station wagon, and this one is not even that small, it’s probably a good choice, especially since I’ve heard a lot of good things about this car so far. Anyway, I’m unsure about the engine choice. I drive a lot of highway (90%), so a little bit of performance would of course be desirable. However, since I don’t know about the Renault engines, I need help here. The 1.5 is supposed to be very economical and robust. The performance is supposed to be fine. I hear less good about the 1.9, it should be more vulnerable and hardly go better, but need a liter more and of course also cost more tax and insurance. The 2.0 is supposed to be really good again and also fun, and this in case of a car, the 2.0 is supposed to be good again. How is that all right? Is the 1.9r also a good choice, or would you prefer to grab the 1.5r or 2.0r? The next point I want to ask is what you should look for when you look at a used megane. You’ll probably be looking at a price segment of 7000-8000€ and if possible buy one with Keyless Entry – Drive. So the cars will have something between 50,000 and 125,000km down. Would be very grateful if you had tips for me. Sincerely, Marc