Ive mounted a lot of bucks with long drop tines, so I got a sneeking suspiscion I know why you said he was grey, yet the pic looks like a normal colored deer. Did his drop tines rub the sides of his neck, rubbing the colored tip off the hairs, down to the grey root of the hair? Ill bet Im right, they call this brooming. I see this on really big drop tined bucks capes.

As for the mount, sorry to hear. When guys in these forums (not the taxidermy category though) give me a hard time for being expensive and taking a long time to get the work back, now you see why guys like me do. Its expensive to do better work, and it takes longer, because more guys like the work, and back us up!

As for your question, I think hes an oddity enough not to need anything special to attract attention, he does so already. Id suggest a semi Upright, as the drop tines would run alongside his neck that way, and flow nicely to the eye. Other mounts would make the drop tines stick out below the neck and disrupt that flow, or eye appeal. Just my opinion, though.