A very good detailed shot. I like V1, and as it is looks fine, - with some more space around the head so its less cramped.
Heres a link to read for information on Layers and Masks, - the secret weapon in Photoshop: http://www.ephotozine.com/article/layer-masks----photoshop-guide-4606
You can apply any adjustment, filter, distortion, etc to any part of any image selectively if you use this method. You can do this also quickly by selecting the area, like the eye for a quick touch up, but spend tsome time with this link and you will be quite amazed by what you can do.
Sharpening has numerous approaches, and all have their fans. The reliable, repeatable approach is to use Unsharp Mask (USM) as follows:
Set Radius = 0.8
Set Threshold = 3.
Slide Amount all the way to the right, to completely oversharpen the image, - so you can see what over done looks like.
Then slide the Amount slider to the left until it looks sharp, and has no "halos" around edges.
Remember that you always sharpen the Re Sized shot for EPZ, - even if your original was sharp, - check anyway and apply some sharpening, as file size compression can make an image soft.
Hope this helps, and gives you hours of fun!