When I bought the laptop, that was one of my major concerns; if it breaks where does it get repaired and how long does it take to get repaired. Since Sager had a facility in Ca. I jumped on it. If I lived out of state, I probably would have bought somewhere else.
With your situation, I would think that you could negotiate to get them to send two more dimms and if you don't send in your two fried dimms, have them charge your credit card for the two additional dimms. That way you don't have to go through packaging the laptop up and the new dimms would be on the way to you now. The motivation for Sager would be that they either give you your money back and get no sale (which costs them money), or they make you happy and keep a customer.
For me, I just wanted to report that some folks are having good experiences with Sager's products and they do seem to stand behind the product. At my work we have had three Sager's. At one time or another each had to go back for a motherboard or a fried dimm; even a harddrive. But Sager fixed them and they are still working 3+ years later. My Dell laptops have had to be repaired too (all three of them). They are still working now.
For me, I expect machines and electronics to fail occasionally, I don't like it and I'm not happy about it, but failure does occur and I tend to be on the losing side of the statistics. That said, my way to mitigate the problem (since I can't seem to eliminate it) is to make sure I have access to the repair facility or I don't buy.