If you don't have any wide angle lens, and you're on budget, tamron is a good choice for its price, providing f/2.8 from 17-50mm range; useful for events.
For events shooting, usually we try not to use too slow shutter (shooting people, etc), so VC may not be useful plus you need to wait for the VC to kick in first. But shooting still subject (e.g. wedding rings, objects), and in low light and no flash, the VC can come in handy for you to use slower shutter speed handheld.
If you feel worth to pay the extra, RM500++ to for the VC, then go ahead;
There's always 2 side of the coins:
1. Didn't get the VC, later regret when you feel you need it, should've paid the extra money and get the VC.
2. Got the VC, later feel you don't really utilize it (plus you need to wait for the VC to kick in), you regret for spending the extra money, you could've invest on something else (e.g. Flash).
Well, it depends on your budget, if you're low budget (don't earn a lot of money) and this is a hobby, the amount difference is a lot; But for those who can afford, they would probably just get the VC version.
So, no worries, test it out and decide yourself, most important if you are satisfied with it.
Btw, there're Tamron lens that made in China and those that made in Japan; look out for it. Get official set (with 2 years warranty from Futuromic) for less hassle and better support.
I think tamron 17-55 should ease to solve my confusion although i haven't test it out both vc and non vc yet .
Let's just say even tamron17-55vc does help to take better photo result like wedding rings , I'm sure the non vc does it as well , as long my hands are not the shaky type like an old man can't even hold a spoon properly