If you're limited to just those two, I would go with the combat machine over the top tech. It's a very reliable little gun and easy to upgrade if you feel like it. There are a lot of options for them now if I recall in terms of looks. It's pretty perfect for starting out to see if you like the sport.
I will echo the comments above and tell you invest in good eye protection and comfortable boots. Consider something to protect your teeth too. Stuff like this should be a priority.