I'm somewhat of the opinion, having spent a lot of effort & time & money getting probably the best bloke in Sydney to do our SSVR, that for general road use & in terms of tyre-wear, the "local tyre place" will get the same outcome as that great bloke.
Let me clarify ... I'm not saying they'll do as good a job. I mean if you've got a few hours to spare AND you want to go for a blast through the National Park straight after, then go to East Coast Suspensions at Taren Point to get it done PROPERLY. But it was probably only 3 weeks after getting the alignment done that I hit a pothole hard enough (it was raining & the pothole was full - didn't even see it) & on the right angle to scratch a front wheel ... which means the alignment is probably affected. And then driving down a laybacks, I noticed when washing that there've been a few extra gutter-rash marks appearing, just general potholes etc. So I don't think that absolute-perfection alignment will actually stay for very long at all.
Make sure that whoever you get to do it quotes you for all 4, you don't want it only done on the front IMHO (and I guess it'd be nice if whoever you got to do it knew that all 4 needed doing for a VF).