looks pretty good. i'm just starting a 1k sons army shortly. also i know its a few years old but in regards to the previous comment, if you look at the box art for the chaos landraider, the lascannon sponsons are in the front so it was constructed correctly.
I love the color blending, inks, and drybrushing. My issue is with your construction. I know the Land Raider can be put together with the sponsons up front but it's not supposed to be that way. I like them better in the back, it just looks a little better to me. Even though they would be functionally better as you have them.