I ended up using Delux on the outbound. Great ride, very nice and comfortable black towncarlota of room behind passenger seat. I didn't ask about age of car, etc. I will definitely repeat. I hope they're able to provide two car seats for future airport trips with the entire family.
I'm currently on my way home, in a Toyota highlander I hailed using Uber (my first time). I selected UberX and a few seconds later Nawaz's picture showed in the Uber app and he called my phone to arrange specific pickup location at LGA. The black car is more comfy, but the estimated uber fare for black car was approx $130 vs uberX approx $95. With my company, that difference matters.
Glad I got to try two new services.