nothing decent under 75....expect to spend 150...this isnt a cheap hobby as you know. save up that much or you are throwing away money on garbage.
in a 24 jbj? with top on? zero option but Sapphire...or possibly a new euro reef nano...open top? that gives you a few more options?
my advice? keep doing 10% WC every week, save your money, and wait for real reviews of the new euro reefs to appear. or buy the euro reef and write us a review....you can come into one for @ 120....with the good rep. that euro reef has for their skimmers, I'd think we'll not see a repeat of the Current USA Fission Skimmer (the ultimate piece of garbage I have encountered)