IMAP also discards information - I don't just want my email, I want my tagged email.
Not.
If you want to keep the tags, take a look at heliotrope[1], a personal email server with tag support that can sync Gmail accounts.
I also live in an area where latency is normally measured in seconds, so I think you and everyone downvoting me are living in a slightly different Internet from me.
Heliotrope sounds like it might offer a good alternative without a six hour journey back to civilization.
Reading this link gave me the push I needed to finally backup my gmail. I've been worried about the [probably very low] risk of Google deciding to close my account, but I'm going to take it into my own hands now, and start using Gmail as my reader only.