Virgin what seats to choose

[Guest]

Holidaying in orlando for first time in Sept and I am not sure the best seats to book on the virgin flight from Glasgow. We are flying economy and I have seen posts about seats in the bubble would like to sit there but not sure about the leg room, both my husband and I are 5ft 11 and don't want to feel crammed in for that length of time we are also flying with our 10yr old son. Notice the back row in the bubble is still available to book. Any suggestions.