I have the Manfrottos MFPro3, which is basically the old version of the tripod you are considering. I haven't used either of the heads, but remember the load capacity for the tripod includes the weight of the head. Personally, I don't think there is much point getting a head that can take significantly more weight than the tripod unless you plan on using the head on another tripod as well (or at a later date). I found that while the 190 is fine for landscapes and the 100-400 in calm conditions, when the wind picks up, it isn't as sturdy as I would like. When I got my 300 f/2.8, I decided to get the Giottos 8241 (I think that's the right model), it cost around the same price and is much sturdier. The downside, it doesn't drop down quite as low and isn't as flexible for macro work. However, Giottos also do other models that would fit better for low down work, also you can replace the standard centre column with a short version. They also have a choice between twist and lever grip legs. The other thing I like about them, is the metal hinge on the shoulder of the legs, rather than plastic like on the Manfrotto tripods.