but will it not make big messes and make the tank cloudy when i plant a new plant or when my plec is swimming on the bottom

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You notice all of the mess alot more with sand as it just stays on top, as with gravel you can hardly see it as it falls in between. As for the water going cloudy mine didnt when i planted the plants and even when i filled the tank up, however i did give it a really good wash to remove all the dust before i filled the tank up. It may be different as to the water going cloudy with different sands but someone with experience with a different type of sand may be able to help you out.
Nice selection of fish you got too
Shaun