check out www.pmasi.org. that's the club's website. we meet in monroeville/ penn hills right off of 376.
as far as your light: it depends on the wattage and the size of your tank. PC's dont really have the PAR that T5HO have. a guy that does research and development for marineland and reef brite came to speak at the last club meet. his spiel: there's great potential with LED's but they're "not there yet". he touched on the other lighting technologies and more or less said that MH is still the technology on which to rely.
i keep my specific gravity at 1.025 and my corals are all doing well (softies, lps, sps). i've read that softies do better at lower SG, like around 1.022/1.023 and sps do better at 1.025, with LPS sitting in the middle. i keep mine high because i'm starting to get the SPS itch and my direction is turning that way. one problem you can have with running at a high SG is when water evaporates, the salinity goes up and might go too high. i run an auto top off on my tank, so the salinity doesnt go up and (more importantly IMO) my tank doesnt experience a quick drop in SG when i would have to add 2 gallons of fresh at the end of the day.
definitely check out the club site, and if you dont mind the drive once a month, strongly consider signing up. i've learned a lot by going to the meetings, from professionals. we have the huge benefit of having anthony calfo as part of our club (google him, and you'll see what i'm talking about). i've learned a ton on this forum, but as with any forum, people tend to follow trends religiously. take the LED's for example: joe shmoes on forums all over the net wax poetic about them, and if it wasnt from hearing from a PROFESSIONAL aquarist, I wouldnt know any better than to believe what i'm told by some dude who probably never did the research or had experience with them. it's also nice to be able to hang out with other fish geeks and go to frag swaps as a group. (we might be renting a bus for MACNA, but that's still in the air)
DISCLAIMER: i'm not bashing LED's or the people that swear by them... its a great technology with even greater possibilites, but after having heard from a professional, i would only trust them as supplemental lighting until the quality control over them gets better.