brewthunda,
I've owned the 656, 656 Schwarz, EZM2, 8828 Ti, and the 203 St, currently the only Sinn I have is the 656 Shwarz.
The EZM1 is the king of "tactical" watches and I hope to own one myself in the not too distant future. You would be more than happy with it if you decide to buy one.
To me, watches are a very personal thing, I wouldn't feel comfortable telling you what you'd like. I can tell you I've been very happy with the Sinns I've owned and haven't had the slightest bit of trouble with any of them. They keep accurate time, are tough as nails due to being held to DIN standards, and Sinn's straightforward, uncluttered, modern styling appeals to me.
Ask yourself what you want and need in a watch, find a model that suits you and don't look back.
The ONLY place to buy Sinn is Watchbuys, anyone else selling them in the US is full of crap if they tell you they're an authorized dealer, and if they tell you it has "papers signed by an authorized dealer" again, BS. Sinn does not provide signed paperwork, you are registered in their owner database in Germany when you purchase. They know where your watch came from and if it wasn't Watchbuys, no warranty for you. Additionally, Watchbuys customer service is second to none.
Bell & Ross are also fantastic in every respect, and the best dealer on the 'net for B&R is Bob at
www.broadarrow.net he primarily stocks/deals in B&R's "professional" line but can have anything you want shipped overnight directly from B&R. He is one of a handful of authorized dealers in the US, and again, customer service is second to none.
If you need any further info, or model specific info on the ones I've owned feel free to ask.