Help deciding on first road bike, choice of 4

[daview]

I need help deciding out of these which to go for:

Btwin Triban 3 red (decathlon)
Revolution Sabre (edinburgh bike coop)
Cannondale CAAD 8 2300 (edinburgh bike coop)
Merida ride lite 88 (local bike shop)

Cheers for any help. Obvious price differences between them, any other suggestions let me know.might stretch the budget if it is really worth it.

David