I'd stay away from the Attack pak - particularly the sand sifting star. They don't last long IME as the sand bed is depleted of food they eat. The cucumber is also a risk - especially in a new tank. If it dies in your tank, or is bothered and expels its guts which they are known to do, I belive it can kill everything in the tank. The star might be OK though.
I'd go with the clown, the pair of neon gobies, and maybe the firefish with decent filtration and about 20lbs or so of live rock and a skimmer. My 2 cents!
Oh yeah, I do have a CPR Bak Pak skimmer if you're interested. Used. Needs a Maxi Jet 1200 to go with it.
"Life may not be the party we hoped for but while we are here we might as well dance!"