Hi - I can answer your #2 - of course, it all depends on what you want to do with your handset, but if you rule out downloading more than 15mb (30 x 15; geddit *smile*) a day i.e. 3 x 5min of mp3s, or only about a 6th of an average Phones Show .mp4 (yes, I've downloaded one episode whilst travelling, on 3g/3g+, at about 0.5-1megabyte/sec; which wasn't too shabby (in London), I watched it, then I arrived;so that was an ok experience; so many variables, but i can just report what I've done!... but I've only ever done it once since June, so downloading and watching movies... just forget it! you have to be pretty tech desperate for that, even with 3g+! *grin*
So, I just use my i8910 now and again (I am still not a fan of the handset, personal opinion), and get my message headers down, read a few webpages, if I have too, and the most I have used is about 300mb in one month. This is the way I have used it. Some months, I have had 140mb, 160mb; in July I was so annoyed with other issues with the handset (bad firmware affecting battery) I only downloaded 70mb.
There's just too many variables to how you will use it, but, force me, and I'd say it is just about reasonable. I'd prefer 1Gb usage of course, like T-mobile; but then on T-mobile the most i EVER used was 420mb in one month. With the small screen, I don't think anyone can really use more, especially with WiFi and full PCs/laptops at home... or at work at the other end of the trip...
However, after 5 months of owning the handset, if one of my mates asked me what I would recommend (I have an iPod touch 2nd gen, and another mate has a 3Gs), I'd say, have a very close look at the 3Gs and perhaps, the new HTC HD2 (just coming out). I'm sorry to everyone who reads this forum, but my opinion still is that for my use (more work-related) Symbian O/S trails WinMo and you just can't beat the slick nature of the iPhone internals to just get on, and get the job done quick.
[I'm not even looking at Android until it hits v3.0...]
In summary, as I've written before, if you want a large, crisp, AMOLED screen experience, and a great 8MP stills camera, with very decent battery life, and the best speakers I've heard on a handset as well; demo an i8910 closer.
For everything else... 3Gs or HTC HD2...
😊 Well, someone has to put a hard opinion down... eek!