I like Livecoin, but their voting is limited to only 1 vote every 30 days per active account, so I think we would need thousands more active Solaris members in order to get enough votes there using their free system.  They charge 4 BTC to be listed outright, which is allot, but less then Cryptopia (and Livecoin is the better exchange easily imo.)

C-Cex isn't that high of a volume, but it looks like they might be more doable via the voting method.

I don't know anything about mercatox myself.