Deckbuilders are one of my favorite genres and Dominion and Clank are both in my collection, including addons and so forth. I also tried El Dorado but have to say it felt like a poor version of Clank. I did not find it very thrilling or the cards fun.
I also had the pleasure of playing El Grande and for that it is a Eurogame, its pretty much confrontation pure. It worked really well though and I think its a very special game. If you can get your hands on it, I really recommend it for 4 to 5 players!