Which YYJ?

I would go Firestorm for plastic (once it comes out), SR71 for bimetal and Diamondback for metal.

Thinking Surge, Inspire, and Theory.

The first 2 are excellent choices but I would pass on the theory

I really think the diamondback or phenom are the best representation of yoyojams potential

The next level and hex are ok as well.

Diamond Back looks fresh and I like the specs, but what does a Phenom look like with out them caps?

http://imagizer.imageshack.us/v2/640x480q90/845/vilf.jpg

the YYJ inspire isn’t that bad plus it looks very pretty in pictures because of the shiny rims its one of my favorite YYJs or the YYJ XLR8 Is really good too.

DARK MAGIC 2 is the best

No! The dark magic 2s shape is outdated and you can find a better Yoyo for its price like the shutter.

The best YYJ has to offer in each price category goes like this for me:
Surge (beast of a cheap throw, pretty sweet)
Inspire is by far the best mid end yoyo in their lineup.
Diamondback is their best high end IMO.