As D&C says, this looks like retirement planning advice rather than tax advice (and you seem to have to tax points covered), so you should really see an IFA that covers international advice. Most of the posters here, as qualified as they may be, probably can't give any investment or retirement advice.
Quick answers to your questions:
1. Who knows ask an IFA!
2. See 1
3. UK pensions will give the company a tax deduction, but the income you draw will be taxable in the UK (unless transferred into QROPS).
4. QROPS is a Qualifying Recognised Overseas Pension Scheme. It's a non-UK pension scheme that has been sanctioned by HMRC as meeting certain criteria which allows you to transfer UK pension funds in without being treated and taxed as if you have drawn the pension. The rules became more complex last year with 25% exit charge being introduced if you and the pension aren't in the right place at the time of transfer.
Only thing I would add is that under point 6 you say UK taxes all income so the tax free period is useless. If you are not resident in the UK you will not be subject to income tax on non-UK income, only on UK income. This means that if you have investments (or a pension) based offshore the income won't be subject to UK income tax. Which obviously makes the Israeli deal more attractive.
Finally, bear in mind that unless you can confirm a change of Domicile (assuming you are UK domiciled or deemed domiciled) it's likely you'll be subject to UK IHT on your worldwide assets. In any event your UK assets will always be subject to UK IHT.