Hi Lead,
no believe me! Sabang is not heaven!
You won't find any angels at broadways or the Pink panther...
Getting to Sabang from Manila is easy. Expensive but fast way: In advance hire a car (around 50-75$) to drive you from the airport to batangas pier (about 110 km from there). Then take a Banka from there directly to Sabang (cost 5$). They drop you off on the beach among the resorts and dive operations!
Economy way (which I did). Take a cab from the airport to the Jam bus station in Pasay (about 3$). Avoid the Victoria Court rooms for rent (which I did avoid in the end!!
). Take a aircon Bus to Batangas Pier, via Calabarzon (there are lots all day long; starting around 5:30 am) which will cost around 3$. From there, take a Banka to Sabang (5$). Really easy!
As for thermal protection, while I was there (feb-march) water was 25-26 ºC. I was fine in my 3/2mm fullsuit. But I don't get cold easily! The divedojo, where I worked/did my courses rents 5mm fullsuits (They are one of the only ones) to make sure their customers don't get cold. I believe the water is supposed to warm a bit for summer, but I don't know by how much... (Maybe others can help?). If you are the chily type, 5mm full would be my recommendation. If you are generally a warm type person, 3mm would be OK.
At least that's my take on it! While you are there, make sure your dive operation will take you to Verde Island (if your diving abilities are up to the necessary level). In my oppinion, by far the nicest sites around there. But there is also plenty of great diving around Sabang if you don't want to pay the extra for Verde. Oh yeah, and if you night dive, do as many as you can! There are full of really cool creatures that come out at night there!
Cheers!