I have the free version of IK SampleTank, which allows you to import samples. I believe Sample Tank can convert some sample formats. If I download these sample files and try importing them into SampleTank, is it better to try the .sf2 files rather than the .sfz?
Anyway, I'm getting into a totally new area here. I've worked for the past few years only with BIAB, and with some limitations. I now have PT and love its editing capabilities. I'm slowly building my knowledge base in all areas of music production, and I appreciate very much the information you provided.
What I mean by these sound players being 'user friendly' is that some of these have words, or abbrev. that at present, I don't know what they mean (macros, envelopes,etc), and without a user manual, or video to teach you, I'm clueless as to what they are there for.
If the free samples don't work for me, I am considering looking into IK Philarmonic. It has twice as many samples, and there is a lot of learing material available.