Managed to navigate my way around the coast of Ireland with v7 in my Quest with no issues what so ever. Without it I'd still be riding aimlessly around Connemara where the signs made no sense.
I'd hang on for next year anyway.. Based on the latest NavTeq maps (in non-Garmin products) they have much better coverage so will give much better bang for the buck... ( spending too much time these days with Americans).