honestly not having ambi mag release and adjustable back straps doesn't really matter to me.
im not sure if this guy has one of the "new" ones but he seems to be pretty stoked on his.
http://www.youtube.com/watch?v=RHKjp3cA_Y0
No, that is an old one... and regrettably the guy has very little idea what he is talking about.
1999-2003 - Steyr M and S pistols (bluish looking, with proprietary "box" rail system)
2004-2008 - Steyr MA1 and SA1 pistols (greyish looking, marked as "A1", some with loaded chamber indicator, some without - without is better in my view)
2010-present - Steyr MA1, SA1 and CA1 pistols with redesigned trigger and extractor. Easily recongiable by the left-to-right roll pin just below the rear sight, and the middle letter in the 3-letter date code will be "W" instead of "O"
In these photos of a CA1 I found, you can see the roll pin just under the rear sight. All the M, S and C pistols built since 2010 have this. No roll pin = older trigger design.
http://www.defensereview.com/steyr-c9-a1-low-bore-axis-9mm-pistol-with-171-ammo-capacity-for-concealed-carry-ccw-and-tactical-applications-full-size-polymer-frame-short-slide-and-3-6-barrel/
Now, keep in mind... I personally don't know if the new trigger is any good. I just know that the trigger on the 2004-2008 guns I have tried is substandard in comparison to its competitors. It will send bullets down range, sure, but don't confuse yourself into thinking it is a "good" trigger. An HK P9S has a "good" trigger. Most good quality 1911s have a "good" trigger. GLOCKs have a consistent predicable trigger, with a relatively short take-up, and a good "springy" re-set that also travels a relatively short distance. Steyr... has had a great deal of difficulty breaking into the police and military market since the M's came out in 1999, has struggled to establish a following (beyond a SteyrClub.com cult following) among civi shooters, actually left the U.S. market for a time, and they have just recently redesigned the trigger of their pistol. Judge for yourself.
Keep in mind as well, I LOVE Steyr. I have three Steyr rifles and I am planning to get a fourth this year. I WILL support their pistol too, if they can get it right and get rid of some of the failed design aspects.
If you really have a major hard-on for a Steyr pistol, then I guess you will have to get one and decide for yourself. If you want one right now you will have to get a 2004-2008 one, as I have yet to become aware of a single redesigned Steyr pistol in Canada. The distributor and the retailers are still trying to clear out the old stock. If you have money to buy lots of pistols, then... what difference does it make? Buy one, then buy something else later, or sell it or whatever you want.