flowerpot - too many reasons to NOT try this one... its hard to argue with success, but for every one that lives and thrives ^, how many die in inexperienced reefers' care? or even expert reefers who just cant keep up with this species' needs
yellow polyps - should be fine, just try placing them up top closer to the lights at first
colt - should be okay as well... quite picky about placement, and you will have to move it around quite a bit until it finds a spot it likes... it can and will also close up for a few/couple days at a time while it is new; not really anything to worry about
mushrooms - any mushroom you want
if you want a hairy mushroom or some sort of ricordia, try placing those higher up... although they will live, you will see better reproduction & colour if the 'normals' are higher as well
candycane - again, it will not "thrive"... but it is a good starter lps...
xenia - always a hit or miss even in the most intense reef tanks... it might it might not live... best bet is try and get a small frag off of someone in your area and try it out in your tank... if it does well, other xenias should be okay as well
other corals that you could have are:
-white star polyps, green star polyps etc...
-sea mats/zoanthids/palyothea
-non-photosynthetic corals such as sun polyps or a gorgonian... it takes patience with these and a lot of time to feed them directly though... the gorg's are more filter feeders, and the amount of food you would have to add to yoru tank woudl probably stress the filter to the max though... should research these specialized-corals for sure before purchasing
-leather corals - pretty much any of these should live (ie toadstool, devils claw, yellow leather.....)
-Im sure there are a ton more but Im sick and tired right now
good luck,
Drew