ML is not what you want, unless you don't fish in heavy cover. MH is the way to go like I said before, make sure it's extra fast and push all the brake pins in except 2, as someone mentioned earlier. The xtra fast action will allow you to load the rod with even a dinger (lighter than a 4" senko). Someone metioned this, that a magnetic brake is the best to cast small baits, with less over run. The Curado 201 is ok for heavier baits, but if you want to stick to shimano, the 101 super free is the way to go. My suggestion would be magnetic, I love all my Daiwa baitcasters, I can throw anything, wind changes, by just a few clicks on the external brake dial. Shimano, well you got to open the side plate and hope you don't loose the red pins. I am not bashing Shimano in any way they make some great products.
Hope this helps, I can go more in depth, but e-mails easier on the eyes.
Daniel