That decision really depends on you. What 2h swords did you use and how did you like them?
To talk about item's worth on the marketplace, it's quite simple:
Danish Greatsword is the cheapest, and you probably won't even have to pay 2 LP for it. Of course that will need some time, for about 2 LP you probably get it instantly.
There is only a little difference German GS <-> Danish GS: Looks, Danish has slightly more upkeep, 1 more range, 2 cut dmg instead of 2 thrust dmg. I'd say about 60% of your hits are swings, as swings got 3 directions out of 4 available, but maybe you thrust more and like to lolstab. I do, that's why I always prefered the German GS. My first decision to take the German GS, was however its style.
The Greatsword is shorter and faster. Never actually tried it(except for a few rounds), but I see some people outspamming me a bit. While using the heavier sword, I just need some patience to beat them then.
I used the Sword of War before, don't buy it for stabs (say, stabs alone..23p unloomed is not much).
I loved Claymore on siege, was amazing there.
Pick one, a German GS is rather easy to trade, compared to a Danish at least. Same goes for SoW afaik, and maybe Greatsword. Danish is far from being rare and you get it for an apple... (not the other way round! x) ). Claymore is not as rare as the Danish, but I managed to get it about 5 times during the last year for good trades.
