ST's are overpriced, I would go for Ghia X 2.5V6 or 2.0. From MKIII range I like Titaniun and Mist but these are also too expensive.
The only problem with Mondeo is that it's going down with price so quickly so you have to be sure that you will drive it few years.
And as per Omega - auto or manual? Main reason I'm asking is petrol consumption
My new Omega V6 auto barely did 32MPG on the motorway (will do some service and see, but don’t expect it go much above that) while Vectra V6 can easily do 40MPG (with leaking exhaust manifold). In town, REAL consumption is around 24-25. Don’t think Omega can even go close to that.
Now I have to buy ca £20 worth the petrol a week, but will it be worth to pay extra £10-15 for Omega additional comfort, or just sell both and buy Mondeo - something between Vectra consumption and Omega comfort. Now when I have a baby I have to calculate those things…