Joe:
Keeping in mind I have almost all the Marvel SS and a few CM including the Predator:
CIM Ex
Spiderman Ex NOOOO. It is too classic.
Thing PF Ex Maybe, but I like mine so no. You never know when SS will do the other 3
Cap Reg PF Sell it and get the exclusive. If you don't want to, keep the Cap America, for some reason this piece get's attention whether you like Cap America or not.
Punisher Reg PF Yes.
Custom 1/4 Scale Hulk Yes, since you have the SS one. Keep the SS one.
Save up for the rest, or borrow. It doesn't sound like you buy outrageously, and you are more quality over quantity collector. If you can afford to buy it now for under $2000, do it. It is an incredible piece. I had 2 SS Exc Pred and sold them to get the CM (well I actually had them SS and CM on display for a little while)
I made a decision to collect mostly Marvel/DC and a few other odds and ends. That meant all my Alien and Predator stuff went(is still going) EXCEPT for the CM Predator, CM Alien, CM Terminator Arnold, CM Endo, SS 1:2 Endo.
My alien bust (sold), Pred Bust (orig, sold), SS Exc Predators (2 of them sold), Terminator Bust (still haven't put if for sale) etc, all gone/going.
1:2 Scale IM Yes, keep it
CM Predator Get it.
CM Superman Get it
Wolverine Comiquette (he's not going anywhere, he was my first SS piece)
Hulk PF Keep this and get the commiquette. The PF will become historic.
Thor PF I have this piece, not crazy about it, but I keep it because it is part of the avengers, or I would sell it in a heart beat.
Punisher Comiquette Looks to be like a good one, most likely a keeper.
