I think you need to weigh up what the likely costs are in terms of general running and associated legal obligation costs (insurance) before buying a big, heavy, powerful (and now relatively elderly) car like an Omega, and try and weigh up whether the pleasure of ownership outweighs the pain of the expense.
I've owned a 2.5 GLS Estate (fantastic, unfussy work-horse)for nearly three years, so was fairly well prepared for the fuel costs on the 3.0 Elite I purchased back in November, but have to admit I was surprised by the size of the insurance hike and the cost of good quality tyres for the 17" wheels...
I know I've bought an expensive car that is frequently going to fling big bills at me if I want to keep it in tip-top condition (which I do), and I still think that the pleasure of wafting around in a large, comfortable top-specced businessman's express for a ridiculously small amount of purchase money that will turn into a whole nest of very (pleasantly [smiley=laugh.gif]) noisy and angry wasps when sport mode and heavy right foot are deployed and the grin that that unfailingly produces on my big daft face outweigh the high costs of ownership [smiley=thumbsup.gif]
One thing I would say - don't ever be tempted to skimp on maintenance and try and run one of these on the cheap - if you can't afford it, don't buy one - simple as.