Hiya my horse is out of a Hanovarian x TB mare and by and Arab stallion. He looks very similar to your grey horse. He's the horse in my signature and avatar.
He is 50% arab but doesn't look very araby at all and really takes after his mum. His grandsire is the hanovarian stallion Augermann.
I'll try and put some more pics of him on here.
Love your horses, how old are they? Did you breed them yourself?
I own an Arabs x hanovarian and also had a ex livery who owned another Arabs x hanovarian. It was amazing as when i saw her gelding, watched him move, the similarities were uncanny - i was in shock when she said the breeding!
I think its a great mix! i must admit, when i saw my boy advertised, the main thing that drew me to go and view him was i was intrigued by the mix!