4 x 24watts T5 is definately better than PLC in term of heat load and tube availability. i use 4 x 24watts T5 with ATI and deltec tubes and can keep all my LPS and softies happy in my 2 feet cube tank.
use the eheim 2215 will be enough. dun waste money on c.ring, go straight for biohomes
of course a skimmer is great . try pasam malam. a prizm and above will be great.
and as for wavemaker , use seio 620. u can get it at C328 for amazing price according to some bro
use tapwater is fine. add antichlorine and i rec marine environment .