Will be visiting Israel for exactly 7 days and am looking for a SIM card for a lot of data usage, as well as short local calls, short calls to the US, and texts to the US, and had a few questions:

1. I get the impression that even prepaid providers in Israel all work based off of plans (i.e. there's no option to simply load a balance that gets charged down based on usage; instead you buy a plan that offers unlimited calls etc. for a set amount of time) - is that right?
2. Also, which providers are both reliable and well-priced?
3. I saw that Snapair (through Cellcom) and 019 offer pickup at the airport - are they good options?
4. For Snapair and 019, their websites mention plans with unlimited local calls and texts and unlimited calls to the US, but make no mention of texts to the US. How much extra should I expect to pay to be able to send texts tot he US?
5. I saw there's a post office at TLV supposedly open until 22:00 - would they offer me a better deal on a SIM card?