So WPA

Use WPA, if your wireless modem supports.
For cracking WPA, attacker has to do dictionary attack. If you use complex password, it is nearly impossible to hack WPA, if your password is not in the dictionary.
Also for cracking WPA, attacker has to catch handshake data, there are some ways to force handshake . But again the reason above, it is really hard to hack WPA wireless network.