If we use non-US domain names, DNS and webhosting will we avoid these laws if any of them come to pass?
SOPA is specifically designed to be used against foreign websites violating American owned copyrights and trademarks, as is PIPA, so no matter where you host, if your site contains content owned by US copyright holders then they may apply to you - even if the site itself is not available to US users.
The former is a US House of Representatives bill, the latter a senate version. If both pass their provisions will be merged into a single bill and voted on again before being sent to the president for signature or veto so it's hard to say how to avoid them until the final bill is voted on.
I can't speak to what CISPA's intent is, but most of these acts are designed to give US (or other countries) law enforcement global reach where copyright or trademark is concerned.
I'm not a lawyer in any jurisdiction, this isn't legal advice, it's opinion.