Hi,
Good first attempt. If you want to also try a very interesting colouful target try the Rho Opiuchus Nebula complex around Antares. That would suit your focal length to a T.
You just need more or longer subs to strengthen the nebulosity detail and yes the darks should remove the hot pixel as long as they were taken at roughly the same temp. Check the dark, if it contains the hot pixel then you are good to go.
See this thread for Rho Opiuchus
http://www.iceinspace.com.au/forum/s...ad.php?t=31656
Cheers Paul