This is an edited version of the Hydro VMF I call Hydro Gallery
Basically, I have removed every single invis, playerclip, hint, occluder, trigger and skip brush I can find, so you can see everything without huge coloured blocks filling your vision!
This helps hugely for me, as I can see what looks nice and what works together.
I have left every single brush there, any missing was probably an accident, but haven't found any gone yet. All lights, cube maps and logic bits are left as well, so if you want to see those, you can.
Hope this helps!