Digibyte by far
https://bitcointalk.org/index.php?topic=408268.1280 Why use DigiByte?
1st coin to fork to multi-algorithm mining (Most fair distribution).
With 5 unique algos & independent difficulties a 51% attack is significantly mitigated and becomes much harder to carry out.
1st coin to develop & implement DigiShield (asymmetrical difficulty adjustment).
30 second blocks are better for merchants transactions.
Professional & dedicated development team since launch on Jan. 10th 2014.
Strategic long term road-map & vision alongside pending global corporate partnerships.
1:1000 ratio with Bitcoin, better for micro transactions.
No more premine as it was given away to users & charity and used for initial development as stated from the beginning until outside funding was received.