Why are there not more SACD-player manufacturers in the high end?
Because it's a niche format. Nobody's buying SACD's but a small dedicated group of audiophiles. If you only have a dozen discs, I would not make SACD the priority over redbook. I would suggest researching to see if there is enough SACD titles out there that you are intersted in to warrant an investment in an SACD player. Honestly, there's tons more new vinyl being produced (across all genres) than SACD.