Thanks Fred. I use Amaze and a recently introduced checkbox for post-demosaic refinement (right under the demosaic method drop down). This additional processing can significantly improve resolution without any artifacts, especially in areas of moire, common to non-AA systems. Refinement is of special benefit for further enlargement of the converted file. Amaze algorithm produces very balanced results - superior resolution and least amount of artifacts, compared to any other method I've ever tested, although at the small penalty of speed. HPHD algorithm is much faster and works very well in most cases. Amaze will have an edge in quality, especially handling of aliasing artifacts.
Regarding performance, 96-bit (3 channels) floating point Rawtherapee-64bit on Win7x64 processing with all advanced and resource-demanding options turned ON - 22 MP file gets processed into 16 bit TIF in 5-10 seconds on a modern i7 2600K CPU with 8GB DDR3 1800MHz RAM.