I've hit a mobius, but never a hitman.
I would say that the mobius's are sweet, hit nice, are beautiful and are very well made - my friends fell off his desk (maybe 3.5 feet high) hit his desk chair, then the linoleum tile floor of his dorm room HARD. Absolutely no damage, so that says something.
I'd still recommend a stemless piece over a mobius. I really don't understand why circle hasn't elevated himself to stemless pieces yet.
Go with the hitman, or a better priced stemless option IMO.
Pretty sure on their website it says they have a future line of stemless pieces that are in the works. Even if they haven't begun making them I'm pretty sure it says something about having stemless pieces in the future.
Okay midway through writing this I googled it myself and found this.
"For those who desire a smaller waterpipe, we are developing a Micro Series. Each have a bent neck top, stand under 12" tall and feature a fixed downstem with a recessed 19 mm Bistibil glass fitting."
Meaning they will have fixed stems, but they're gonna be small.