First time flasher, be gentle with me!

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http://androidforums.com – Okay so I rooted my device and now I want to flash a ROM to it because the stock one is a bit dull. I have the stock back up from this forum so I can always return to it. Also I used TWRP to back my stuff up. Now what should I do? I want to best ROM out there, one with good battery life and frankly pretty ;). What's my next step? Thank you guys. (General)