Which LCD display works with Ramps 1.4?

I have Ramps 1.4. I want to add a 2004 backlit LCD. I found two types on ebay, a cheaper standard one. and one that says serial i2C version. Which will work for Ramps 1.4?I have seen videoes where the connector goes on the board. Just dont wanrt to buy the wrong one.

Also. the "Smart Adapter" is there a place just to get that adapter? I have an SD card reader and a rotary encoder already. Do I even need the Smart Adapter?

Thank you!

Maxi