Let's start with the lenses in your profile
DA-L35/2.4; doesn't that fit the bill for 30ish?
M50/1.7; doesn't that fit the bill for shallow DOF?
So the question is what you want to achieve? The magic of the limiteds? Expansion of your prime range? Better IQ?
In my opinion one needs one lens that can be one's daily walkaround prime lens. For me the FA31Ltd fills that requirement (wide enough and long enough). You say you prefer 30ish, so if the DA-L35/2.4 does not fit your requirements, there is only one option
If you want to expand your focal range, the DA21Ltd is an obvious choice (if you need wider). I don't think the FA43Ltd will fit your current setup; I would rather expand with a DA70Ltd or FA77Ltd.
Just my thoughts. I shoot with a FA31Ltd mainly (over 90%). I use a DFA100WR if I want to zoom in a bit or for macro; the gap is huge but I can work around it most of the time; if not, I use my M50/1.7 as a gap filler. My kit lens gets occasional use when I'm asked to do 'reporting' (about twice a year).