It depends on several factors
Selecting an anchor, IMHO, depends on more than just weight. Type of bottom where you anchor is to be considered. If you look at the mfg's. sizing charts, most will recommend a 35# anchor for your boat. But a Danforth type will certainly not be needed that big. I have a similar sized boat, and have a 35# CQR as my every day unit. Also have a Danforth which is about half that weight, and a 44# Delta. The CQR is my every day anchor, the Danforth as a back up, and the Delta is for any expected severe conditions. Bottoms here are soft, with no rocks.