Serenity:
Budget
Lease amount isn't important. If the interest rate is crippling or the period is 60mths compared to 36mths - you may end up paying far more than you wanted. For 1000chf per month you can easily get a brand new Volvo Estate (V50, V60, V70) with a very good specification.
Give an indication of the total price of the car.
Safety
Pretty much all cars will have NCAP 4 or 5* ratings. Kias aren't bad - their advantage is lower running costs. However their engines aren't as efficient/powerful as rivals.
Performance
A 1.8 litre engine can produce considerably different levels of performance/economy depending on the manufacturer. BMWs latest 320d (or X3 20d) is a remarkable bit of kit. Huge (if peaky) performance and exceptional economy.
Image
Volvo = family, safe, conservative
Audi = well made, Swiss loved
Subaru = The farmers choice
BMW = sporty but frugal
Merc = Luxury
VW = working towards an Audi
Generally, the image of Opel/Ford/Peugoet/Renault is poor in Switzerland, ranking little higher than Japanese makes.
Think twice about whether a people carrier type vehicle is the way to go. If you don't need 7-seats don't buy a 7 seater. A more traditional estate style car will be more economical, arguably more attractive and easier to drive.
If you are looking for main dealers - go to their swiss websites and look for "Handler Suchen" or "Standort" - you can then usually search by post code.
Assuming your budget (leased) is 50-70k, I'd look at:
Volvo V60/V70 - D3
BMW 320d
Merc C220d - Used
Audi A4/A6 (depending on space requirement)
If you want to buy a petrol engined car - the only manufacturer which has managed to mate good performance with economy is BMW.
If you want a "cool" family estate - and are happy with 4 year old - there are a number of V70R available - both auto (not a great match to the engine) and manual. More than enough sporty image for the husband, plenty of space, great seats, good safety, and 4 wheel drive. They come in around the 40k mark - which with a 10% deposit will be around the 700-900chf per month depending of residual payment and lease rate.