The "general" rule
of thumb is that you need at least 1 lb of anchor weight per foot of boat length. So in your case, minimum 45 lbs. 1.5X is better. Of course this doesn't take into account your displacement or where you cruise
. You also have to be able to retrieve it, so consider your ability to raise a heavier anchor.
Again, lots of opinions on this but my take is that anchor weight, sufficient chain (which you have) and technique are more important than anchor type.
FYI my main anchor is a 66 lb Bruce, 70 feet of chain and the rest nylon rode
on a 41 ft 10T boat. My rig so far has done fine in all kinds of bottoms and all kinds of conditions. When my budget
allows, I'll upgrade to a new technology like a Rocna
or Manson, in probably the 80 lb range.