Steyr reliability is not hit and miss, a few of the older pistols had some minor issues that seemed to work themselves out when broken in, and the newer ones for the most part have no issues. The problem is that most folks don't post on a board about not having a problem, so the only stuff you end up reading has to do with folks with issues, many of which were either solved by a thorough cleaning or ended up being a magazine problem and unrelated to the functioning of the pistol. I can see where this might lead you to believe there are reliability issues, but it's simply not the case. In fact, there was a recent poll of this question on the steyrclub website, and the overwhelming majority of owners either had never had a malfunction or had a few early FTE's prior to a good cleaning.
I have close to 5k rounds though my steyr and have yet to have a single malfunction.
As to the issue of support, Steyr indeed had some growing pains when they initially tried to enter the US market (changed distributors/suppliers/support a few times), which gave them something of a bad rap with some folks, but they have eliminated the middleman and opened their own support center in GA, and the reports coming from folks who have had occasion to deal with them have been nothing less than excellent, even to the point of extending warranty service to guns long out of the warranty period and for things that wouldn't ordinarily be covered, such as damage from abuse or accident.
The older Steyr pistols had compatibility problems with regard to accessories, having a proprietary rail mount and all (they were built, after all, prior to there being a clear winner among the different types of rails), but there is an adaptor available that will allow the mounting of standard lights and other accessories to the older pistols. The new A1 does not suffer from this, it has the standard picatinny rail.
In short, service, parts, and accessories are no longer an issue with these guns, so if that's all that's gotten you wary, take a second look. Or don't, that means more Steyrs for me
The Steyr is a superior design, low bore axis, almost no muzzle flip, ergonomics are the best among the tupperware pistols, it has (IMO) the best trigger among them, and the sights are perfect for rapid target acquisition (and re-acquisition, allowing for quick follow-up shots). For precision shooting, you may want to replace them with 3-dot sights, but this is not an issue.
Hope this helps,
~Rick