Now that I finally got a data plan for my Treo. Which of these three would be the best way to get my mail as far as draining the battery the slowest? I use GMAIL btw.

1. Pocket Outlook IMAP on 15 min checks for new mail.

2. Flexmail 4.1 with IMAP IDLE

3. Push mail via Nuevasync.

Thanks for any input.