Blackberry Curve 8520 or E71 or E72?

[SCREAM FOR MY ICE-CREAM]

E71
Network : 3
What you get : Up to 700 minutes Daytime Any network or Up to 700 texts Daytime Any network, 300 minutes Anytime Same network
£21 a month

Blackberry Curve 8520
Network : Vodaphone
What you get:75 minutes Anytime Any network, 500 MB Anytime Any network, 250 texts Anytime Any network
£20 a month

E72
Network : T-mobile
What you get : 300 minutes Anytime Any network, 300 texts Anytime Any network, Unlimited Internet Anytime Any network
£20 a month

WHICH SHOULD I GET ??