I love the color of the Emerald Explorer (plus, it has the ringed handle as others have mentioned). However, the Icicles probe tapers more at the tip to ease insertion. You'd have to keep a good grasp on it to be sure it doesn't slip all the way in though.
May I make another suggestion? You might want to also consider the Sapphire Falls
. I own this toy and love the "bloopy" texture and sensation (though I use it vaginally, it would also feel great anally).
The Sapphire Falls is curved so that you could angle it better for prostate stimulation (I know it works for G-spot stimulation, and more often than not, what works for G-spot stimulation will work for P-spot stimulation). Plus, it is tapered like the Icicles. Of course, it does not have the ringed handle for easy removal, but it does have the larger bulb at the base, which you can grasp.
I think you should try both the Sapphire Falls and the Emerald Explorer! (Can you tell I like to collect toys and to encourage the addiction in others?)