Palm Treo 600 (GSM)

I am trying to decide if I should wait until the supposed Treo 610 (with Bluetooth) comes out, get the Sony Ericsson P900, or the MDA II (also knowns as O2's XDA II. Both the P900 and MDA II have bluetooth(a major deciding factor for me since I have a Nokia 3650 now and 3 different headsets) but I know there are more programs avail for Palm than Symbian and Pocket PC. Has anyone had the opportunity to use any of these and have an opinion of what is the best unit? Size, bluetooth, memory, features and compatibility are what is driving me decision. I've even considered buying a Moto V600 and Palm Tungtsen T3 but it seems like a step backwards(2 devices). Help! I don't know what to do and I'm getting impatient. Also, I have an idea for a design of a new phone/pda that I think would blow away anything out there but I don't know who to contact about it or how to go about getting this idea off of the ground. Any ideas?