I was just dreaming this up now, but it sounded titillating to me!
Something in similar design to the Eupho, but with one MAJOR difference.
The tip itself:
Instead of just being one bulbous end have two slightly smaller ends that are rounded instead )no wider than the Eupho is now(
Basically like a "forked tongue" except instead of it being side by side have it one above the other. And not centered, have one "tongue" on the left side lower, and one "tongue" on the right sight slightly higher so you get a licking sensation from the head of this newly constructed Lounge Lizard - I guess a double bump to the prostate just slightly apart as you contract - so you get a sensation of, I guess, a ribbed sensation?
I guess the idea is to slightly tease each lobe of the prostate separately rather then one bump possibly hitting it together.
The rest of the body could be the same as the Eupho I think, or maybe a slightly more aggressive angle. I like the idea of a slightly more aggressive angle, but it's definitely food for thought!
Perhaps, if you are over 5'11" tall and don't mind bulk resembliing the MGX, how about the PS-New ? http://www.highisland.com/detail.php?categoryid=2&productid=2