The only thing that puts me off the Marshall is that it seems White can draw easily if he wants. For instance, in this line:
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15.
Be3 Bg4 16. Qd3 Rae8 17. Nd2 Qh5 18. a4 Re6 19. axb5 axb5 20. Ne4 Bf5 21. Bd2 Rxe4 22. Rxe4
Nf6 23. f3 Qg6 24. Rae1 and it seems black has nothing better than 24...Bxg3 leading to a perpetual. Does Black have any other options in this main line with Re6 and Qh5?