My intention was to reduce the losses in the short term, or at least I think that's my aim. I may have got it wrong, but I'm not 100% sure of how badly. I no longer have the cash just to use on a car. I suppose I'm gambling on a possible future value offered by BMW being conservative and actually coming back at a better than expected sum. I'm also worried about the paintwork on the current car. It's been partly re-sprayed and fully re-polished. That's never going to be good, so need to chop that now.
The maintnance comment was only me voicing a concern about just how much these blasted cars cost to fix.
I've got £46k back on the X6, which whilst better than the first offer, is still not as good as I'd hoped for - though not bad. Some if that is being used as the deposit and a large sum goes back in the Bank. A GFV minimum of £25k has been given at 36 months and 30k miles. It could worth be a lot more though - a huge gamble I know. I may not go as long as 36 months, in fact all the advice I've now also had is not to!
As has been said, the first year is the worst, and the VAT loss hurts the most. Of course BMW will build this in somewhere. In my current circumstances this seems to be the best way to go, and works for me. Whether it really works out as I hope it does (ie I don't get burnt) only time will tell. My 'outlaws' have done it for years and it worked well for them.
Doing it now hurts yes, but doing it in another year or two will be worse still. I could also never pay cash again due to circumstance changes so by keeping more in the Bank and adding the ability to walk away after a certain period if necessary gives me a little bit more of a safety net. I'm the wrong side of 50 and have to look at things differently. Part of the car gets paid month on month, and part is deferred. I guess I'm hedging my bets, reducing debts that we have and keeping a decent car for now all at the same time. Whether I'm right or wrong I have no real idea. It looks OK, but then this may well be the last new car I buy, and I have no idea what the future will be or bring. Funding everything is the issue, and I could end up with nowt at the end if this. Someone is bound to find a serious flaw in my illogic (I won't call it logic for that reason) and point out that this isn't the thing to do. They may be right
And no there isn't an LCI E71 until Autumn 2012 at present.
In the event, and after much more careful thought, and reading your comments, and re-running the figures, I have taken a gamble (foolish or not) and ordered a new X6 40d in the same colour combo (I think it's the best for that car) and it should arrive in January. If I was going to run the car into the ground by keeping it then the cash loss is now too much. This isn't hugely better, and I may be driving a 10 year old E53 again (nothing wrong with that I know) come 2014, but at least I've tried and had some fun too.
Right! Now I'm going to stop 2nd guessing myself about the whole thing and just enjoy the moment

Until that is someone comes along and ruins it......

it was either buy another X6 now, or go back to Vauxhells!