Well, this is a bit of an old thread, but just for the record, I have a CTX PR960 that has dual inputs (though one is BNC).
But be forwarned... It was a nice monitor when new, but it died after about 6 months. I sent it in for warranty work, and although it did work again when they returned it, it was really screwed up. It had evidence of physical damage, and the right 25% of the screen is completely discolored. I spent months leaving messages, sending emails, and trying to convince receptionists to give me someone live. I got no where with them, and have been living with this screwed up monitor for years now. I just (last night) ordered an NEC FP912SB to replace it, as I can't take the screwed up picture any more, but I'm having to give up the dual inputs.
So if you need dual inputs, this is an option, BUT BEWARE CTX's RELIABILITY AND SERVICE!!!! You don't need both inputs to be HD15, you can use BNC inputs, and just use a BNC cable (which has HD15 on the other end). BNC cables generally give you a better signal anyway. Hell, I've got one I'll sell you since I won't be using the BNC cable any more.