You should update the images and add more because unless if I have just had a total memory loss, what I just ran around in looked quite different to that shown in the images, for starters, time of day :P.
This map actually wasn't too bad, you still have more work to do but I understand that this is a beta version. It needs a bit more depth and detail and probably a 3D Skybox but I do understand that this is Counter-Strike Source and you can't exactly go nuts on the visuals.
Layout was pretty sweet aswell.
As for the performance side, the only thing I can suggest is going through the [url=]Half-life 2 Map Optimization guide[/url]. I did cruise around the map in mat_wireframe 1 and noticed that alot of things where being rendered that couldn't be seen by the player that could perhaps not be rendered, but your going to have to use occludes, redesign the map slightly or optimize in other areas (entities DO NOT block vis) to solve this problem.
Some other things you can do is increase the light map scale on certain textures to make performance increase, but this will make the lighting more diffuse so you may only want to do this on certain textures. Add a fade distance on certain models to increase performance and ofcourse, tie smaller brush detail and things that do not need to block vis to func_detail to prevent them from cutting into the world geometry, creating more polygons and decreasing performance.
Look forward to more updates in this map

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Aaron's Stuff