To Flash or Not to Flash (Telus)

[proplayer44]

So I have tweaked my phone to where the TF3D works fine with no lag. I used some the programs and instructions from XDA, before I discovered this Diamond forum.
I've done another couple tweaks but can't remember what they were.
My email works pretty well now.
My TOM TOM works well enough although it does take 3 minutes to find the towers ( I can live with that).
I'm totally not happy with the chit camera but meh.
I also hate my battery life.
Flash videos don't work. Besides Youtube

What am I missing with not putting on a custom ROM. Battery life could be increased and GPS made slightly better but I'm not sure what else I'm missing that could be great. Is flash working on the cooked Roms for Telus.

If I was to flash it how do I go about saving my Contacts and the "People" tab with pictures? I know use Active Sync. But how, is there instructions? Once I copy them off how do I get them back on exactly the same.

These are some reasons I'm delaying flashing my Diamond and I assume some other people are the same. Can you help with this?

Thanks