baaldi...I told you to watch that finger......it's loaded!!!
CWR anchors are ok for bigger vessels, Rocna's the same, Plough's are basically the same. The Bruce or Danforth/Fluke work better from experience with little boats, although if you buy one that you have seen on ebay at least it will fold flat to go into the locker as JB has already said. I agree with baaldi go for the heavier one with your size of boat.
I know this will be controversial though, on a larger vessel we tend to use anchor chain for the whole rode, this provides two things, abrasion strength and in low winds and tides the weight of the chain provides a little give like a spring. It's big against's are its weight and in stronger winds, no give. On a sportsboat with the lack of space and the limited time at which they spend at anchor, rope is the preferred rode simply that its easier to store and lighter. We must however have at least 20', if not more of chain and I would have at least 40' to provide resistance against chaffing on a rough bottom, which is really why we put it there. It will provide a little spring in low winds and slow tides, however even a small sportsboat weighing in at 1000kgs will lift a 40' chain straight fairly easily in a 5knt current and a 10mph wind. Therefore carrying the correct amount to get the correct scope is important and as JB say's remember to have enough if you are anchoring on a rising tide.
I still like Argonauts set up.