Heres the quick rundown on each case. (each case was $7-10 from Amazon)
Supcase Unicorn Beetle - http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
Great construction. Fit and finish are very well done.
Frosted back hides scratches easily.
Feels "tougher" than the other two cases.
No bumpers on the back to protect the case from scratches. A minor con since the frosted texture hides scratches very well.
Headphone opening is the smallest of the three.
Buttons are VERY firm. Didn't soften up after a week of use.
Frosted back distorts color of the Nexus back.
Spigen Ultra Hybrid - http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
Very premium feel. Soft texture on the TPU sides, most pleasant to hold.
Bumpers on back lift case and protect it from scratches.
Comes with free screen protector.
Cool engraved buttons.
Buttons have good response and are fairly clicky.
Easy to accidentally press buttons. Frequently hit the volume buttons while trying to push power.
Rearth Ringke Fusion - http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
VERY slightly slimmer than the other cases.
Same soft feel as the Spigen, just a hair inferior.
VERY clicky buttons, excellent response and no accidental presses.
Similar bumpers as the Spigen though not as pronounced. Still effective.
Hole for lanyard.
Buttons are not fully sealed, possible entry for dust/dirt.
Overall finish is less than Spigen or Supcase.
I should note, there appears to be another decent hybrid case out there, the iBlason CandyGel Hybrid (http://www.amazon.com/i-Blason-Googl...blason+nexus+5). I have not tested this case but if there is enough interest I will pick one up and do a quick review.
Please leave feedback and feel free to ask any questions you may have!