I9000 vs I9001(left one)
look at the diff between s and s+. ask around coz i tink both models might have been discontinued.
s+ speed tops but s got more devs making custom stuff.
in terms of updates from samsung, dun expect anything at all. -.- they probably drop developments d.
s2 should be nice but if you can wait then wait for i9300 to come out coz by then s2 would be cheaper.
iphone for me is overrated and android is alot more customisation especially after rooting.
do more research on this tho.
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Samsung Galaxy S+ with Cranium RC8 and SkyHigh kernel.

probably updates are not so important for you. but if for emailing and reading websites and very little multitasking i think ANY model will do. if you can get a good price would be ok adi la. samsung warranty is 24 months only. probably registered by the previous user coz its all on9 warranty. with good care and all shouldnt be a prob with the phone. and if there is its probably the "good deeds" the previous owner did. ask properly before handing over $$.