Problem is, I'm not sure which pics to delete and which to keep 

These are the only ones I considered good ones... IMO
39
37
35 (rename it so people know your mod changes lava too)
20
19
11
1
Ideally, you should give a name to each screenshot highlighting the feature of your mod you are showcasing...
So If you have a nice shot of water caustics, you should name it something like "New water caustics effect"
Definitely need to make sure to name the lave screenshots appropriately since some people might just glance over the shot and think, "wow that's orange water... That's weird..."
Make sure you highlight a screenshot that shows off all the features... underwater god rays, no blue line on the horizon.... etc...
You sold us in the OBGE thread, now sell it to the TESNexus newbs... :tongue:
If it was my mod, I wouldn't have any screenshots up unless they were really HQ.
We can also take some for you and you can pick and choose the ones you like.