well i got a 55gal too.. no no no no damsels. they get mean. i know they're cheap, but cheap isnt the best way to go. clowns, gobies, reefsafe wrasses, blennies. maybe a smaller tang. yea i got about 80lbs live rock in mine. as for lighting, anemones need lots of light. so u could save money and go straight to metal halides or u could get power compacts or vhos. if u go wiht pc or vho make sure u get something u can upgrade later, i knnow u will want to.!!!! i did it. i started on a pc fixture. then i built a canopy and took apart the pc and retro fit into the canopy, with a pair of mh. so i really didnt lose money since i used my pc. anyway as for fish i got these fish in my tank.
1 sixline wrasse
2 black sebae clowns
1clown goby
1 spotted mandarin( wait untill ur tank is atleast 6mons old.
1 scooter blennie
1 watchman goby
2 neon gobies(cleaner gobies)
1 sand sifter goby
1 convict tang
1 hippo tang
1 yellow tang
um think thats it??? i did have 2 firefish but my pistol shrimp ate them( i hate that guy!!!!lol
man thats alot of gobies!! and im getting a bigger tank for the tangs so thats y there in their. and i got a 10gal sump with 20lbs more lr in it. and a good skimmer. but thats just to give u some ideas, i wouldnt recommend gettting that many fish.