Don't Buy if You Can Wait for June
There is a good chance that we will see the 2018 MacBook Pro release date in June or July, right after WWDC 2018.
Apple is back to an annual update cycle and there will be Intel Coffee Lake processor ready that should give a good performance boost to the 13-inch and 15-inch models.
If you don't need to buy a MacBook Pro right now to replace one that is broken or lost, you should try to wait for June to see what Apple delivers.
Here's more on why you should wait for the 2018 MacBook Pro.