PS Vita or wait?

I've been toying with the idea of getting a Vita for what seems like forever, now it's below the £200 mark at £179 I'm thinking now is the right time. However the slimmer, lighter more colourful are all "features" that appeal to me. With such a device is just being released in Japan, it will surely make it's way around the world next year. The problem is the dropping of OLED for LCD, my question to Vita owners is just HOW good is that screen? Is it worth making the purchase now for said screen.

TL;DR: Buy OLED Vita or wait for slimmer, lighter colourful LCD model?