ill do my best, right, keep the tank,what power are the t5s?might be better going for metal halides on a big tank but depends on what ya wanna keep!filter ok at a pinch but sling out all ceramic tubes + sponges,replace with live rock rubble,bin the internal,for water movement get some big powerheads aim for x30-50 turnover,heaters keep,rock i take it is ocean rock? if so bin it + replace with appx 150kg live rock,if ya can, set up a sump, youll need a big skimmer summat like a v2 1200 the list can go on + on depending on what ya gonna keep, how big is ya bank balance etc...check out
http://www.reefsuk.org/forum/index.php or
http://www.ultimatereef.net/ or
http://www.ultimatereef.net/ do as much research as poss as getting it wrong with marines is a whole lot more expensive than it is with fresh trops id aim to spend at least£800 on setting up a tank that size you may get lucky like i did + get a lotta help from friends or find good second hand stuff on the cheap but dont count on it good luck