I have only heard about Syscoin and I think it looks quite promising. I haven't seen the other coins as of yet, but I'll surely check them out if you think that they are high quality coins. It's quite hard to keep track of every quality project, because there are simply so many of them that are bringing in amazing innovations! Of course, there's a fair amount of coins that are wortheless as well, so gotta be careful about picking what to invest in.
Looks like the market likes SYS too. Six days later and it's still on a tear.