I have been using Olympus 8x40 since 5 years now for casual birding and I love them. I just checked Amazon, they sell them for $64. If they're in your budget, I highly recommend them.
https://www.amazon.com/Olympus-Trooper-8x40-DPS-Binoculars/dp/B0001M3612
Do you think these would be good in conjunction with the Z8?
http://www.amazon.co.uk/Olympus-8-40-DPSI-Binocular/dp/B0001M3612
I bought a pair of these years ago - still using them!