Most of your other items are actually A LOT more expensive than DX. I think you're going to have to do better than that. Can you beat the DX return policy? They pay up to 1/3 the item cost for return shipping to a US address. What country do customers have to RMA their DOA and return items? Your web site was quite vague.
You might also think about adding a forum so customers can discuss your items.
I agree with most if the criticism both about price (Kaidomain's price for the R5 for example is cheaper then LT & DX http://kaidomain.com/ProductDetails.aspx?ProductId=10197), the problems with the site and the differing warranty terms.
But one thing I like about lightake is that they do appear to respond to product requests. If tried a few times with DX with no luck and a few of the requests are thing I think they could add. I guess if enough people ask or the right person happens to ask then may be. I made a request for a few things a few days ago to znmzdx including XPG R5 drop-ins and the silver Solarforce L2 with extension tube body and while I don't know for sure my requests had any influence they've now been added. I see they also have Solarforce L2 with extension tubes and dropins now as well and the price isn't too bad.
However still no SheKor charger, it seems that no one but KaiDomain are able to sell it. May be they got a good price so the other sites don't bother since they know they will be rather expensive.
I'm sorry for that ,sometimes our price is expensive than other dealers,because we have a different dealer price ,but we will cut down the price if it possible ,and we will offer a discount later,I hope you can understand !