so im looking to do all the battery saving tweaks, set up nokia messaging, importing phone contacts, some emulators, etc.

what do you guys like as far as:

-misc software settings and tweaks? usability as opposed to power saving

-best media manager?
i need .ogg support for sure, .flac would be better.
any gapless solutions?

-best repositories?

-any other must have or up-and-coming apps?

thanks