Carl,
Speaking from personal experience i'd go Navy.
I flew for 3 1/2 years and loved every second of it (until I was chopped!). I almost made it and got my wings but fell at the last hurdle. Nothing is guaranteed and now i'm on the outside trying to do the same as you.
I don't regret joining the Navy and am bloody glad I did it! I've got 400 hours in the bag all for free and it will look great on my CV when I do eventually get my ATPL!
Feel free to PM me if you have any specific questions.
Good luck!
flyhiguy