Upgrading to 6.1

[rimibar]

I have the following kit (see signature below), and I have been recommended to add another speaker turning it into a 6.1 system. The additional speaker will be flush-mounted into the ceiling.

Do you think it's worth doing this? Or should I hold out and go for a 7.1 Jamo D7 system when I have a few more pennies?

Thanks,

Richard