Completing w/ non-suited connectors

[beachbum]

Just a quick preflop question. What are your standards for completing in the SB with non-suited connectors? Here are a few scenarios:

1) 78o: 1 LP/P limper, 1 sLP/A limper, LP big blind (5.7:1 @ 5/10)
2) 56o: 1 LP/P limper, 1 LP/A limper, 1 sLP/A limper, LP big blind (7.3:1 @ 5/10)
3) 9To: 1 LP/P limper, TA/A big blind (4:1 @ 5/10)

I'm usually leaning toward folding these non-suited's but wondered if any of y'all have found equity there.