Depends on what you need.

Even borland ended up replacing there default memory manager with once of the ones in the list on the site you posted. I can't remember which one though.

Borlands memory manager is good, but I think it does fragment memory if you are doing allot of create and free's within you application. Some of the other memory managers perform better as they block allocatei.e grad a whole chunk of memory in one go rather that lots of small chucks, this is quicker.

the memory manager for this engine has already been tested on one of the other projects and it works really well. I'm not too bothered about the memory system at the moment, I'm more interested in getting the engine design right