This page on V-Flyer rates row 19 window seats as average.
This page on Seat Guru warns that row 19 window seats are missing the window.
I think you can go online at Virgin's website and choose another seat, and using the above seating maps with ratings choose something better.
The experts on V-Flyer forum are always full of good advice for people that don't know what seat to choose!
flyingbee