Hey Hoagy,
Great to see a fellow Eireannach around these parts! I'm just above you in Roscommon 
Admittedly, I know very little about single table SNGs as I mainly play 180 MTSNGs. I did, however, in the past dabble in the 9max SNGs at both the $1.50 and $3.50 levels. We are talking at least 2, maybe 3 years ago since I would have grinded those games.
I think the days of lotto players or fields where lotto players take up a higher percentage of the fields are long gone now. Most players have a decent knowledge of how the game pans out. Don't get me wrong there are lots of weak regulars with basic knowledge that are beatable etc but even in the micros now I guess Stars have a fairly decent player pool.
I definitely would not advise MTTs on Stars and I think you already know that yourself but MTSNGs are definitely a happy medium. 45s are OK (have a small winning sample on them up to $3.50s) and of course the 180s but they are turbos and I believe you'd rather stay away from those elements.
There is $1 180s regular speed and then $4.50s is the next level. They last about 4-4.5hrs from start to finish. Have played a few $4.50s in my time but never the $1s so I cannot say much about them. If 180s are too long then there $1 and $3.50 45 mans. They last about 2 hours 10 minutes.
Everything else is pretty much turbo territory 
Hope that helps!