Unfortunately I think it's a little late in the day to buy into a Vega lc64, ( but on the other hand with Amd behind with Navi and Nvidia being greedy there is nothing really more attractive or value for money if you need something now.
Furthermore Turing is just a box of Mini-milks, and Amd's Navi isn't going to be much of a performance increment over Vega. So you'd still get a good year or two out of the Lc64, but you could lose a lot of money as it devalues quickly.
It would have made more sense to buy Vega64 at 1st release and enjoy a solid year and a half of gaming for not a lot more money than buying into Vega64 today.
However if depends on your current gpu and what you need, if you are at 1080p/1440p and you can budget it for it then go for it.
I have 2 v64's a reference and an Lc64. When I first bought the Lc64 I wasn't really impressed as my reference did quite a good job, but over time I've come to really love the lc64, it's so quiet and well made.
1700/1100 is pretty much the perfect everyday setup.