Well I've owned Goldring DR150 and Creative Aurvana Live! Also have the JVC HA-RX700.
I do most of my gaming with Dolby Headphone, which will affect my opinion. When using Dolby Headphone a small, neutral soundstage is actually beneficial (as Dolby Headphone includes soundstage cues). Of the three, I was most impressed by the DR150s. They make excellent gaming headphones (with DH - not so much without). I found synergy with Dolby Headphone to be below par on the CAL! and HA RX-700.
Alternatively, Goldring's NS1000s offer the best Dolby Headphone synergy I've heard in a closed headphone (I mention them as they're price competitive with the other headphones you're looking at). Incidentally - I would say the NS1000 utterly outclass both the CAL! and RX-700 as gaming headphones with DH.
To get Dolby Headphone on the 360, you would need something like a Victor SU-DH1 (I recommend Victor over JVC, as you can use an AC adaptor with the Victor) or Astro Mixamp. I prefer the SU-DH1 as it has 3 Dolby Headphone modes, giving a bit more user choice. The mixamp has just one Dolby Headphone mode.
I will say one thing about the CAL!s though. They're really comfortable. The Goldring DR150s can be a bit clampy, especially when new.
Edited by ear8dmg - 11/6/10 at 3:59pm