I don't know how comfortable you are trading points, but both points which you currently have trade pretty much on par with American express points, and American Express is currently running a promotion where they give you a 40% bonus on transfer to Avios. You can use 60,000 Avios on Air Berlin to Israel with a fuel surcharge of <$100 per ticket, so the 176,000 combined points which you have already should be enough for four round-trip tickets to Israel. Among the many caveats to this plan though are that (I) you would need to make the trade ASAP before the 40% promotion ends, (II) you would need to keep your points in someone else's account for two years, and (III) you would need to hope that there is no devaluation or changes to the Avios program or their partners within the next two years. Bottom line, as has been suggested above, I think that the best strategy for any points or miles redemption so far out in the future is selling points that you currently accumulate, and then buying the most practical and beneficial points when the time comes.
