try carrentals.com. I have found that the price they quote for Sixt includes insurance charges (unlike some of the other prices quoted) and is a good price too.
are you sure it includes 3rd Party Liability??? Im not since they are trying to get you to purchase the CDW at least when I clicked on the Budget choice
Im convinced once over there they will hit you for the LDW .
BTW click onto "Total Price" in Blue below your quote and it states "... This price does not include services such as insurance waviers etc .... and the LDW is exactly that. You wont win any Dispute with that * on their website, so carrentals will probably be the most expensive way to Rent in the end
If I remember correctly Dan rented via Budget and in the end got hit with the LDW charge once over there. I dont believe he ever reported back what became of his Dispute of the charge, nor do I know if he used carrentals.com, hopefully he will read this and post an answer so others can be fully informed