Markins makes the best heads in my opinion. The Arca Swiss P0 is also a nice head. I've never liked the RRS BH40 and the BH55 is too big.
In my opinion traveller tripods really kick ass since they are light and sturdy. 2 series tripods are a compromise between weight and rigidness. Three series tripods are outright rigid but also a pain in the ass to carry.
You want light get a 1 series traveller. If you can't have two tripods get a 2 series regular or traveller. If you can afford both buy a 1 series and get a 3 series when you actually put a 300 2.8 on it.
I used to own a 2 series and now I own a 1 series traveller. I love it because it's light enough to take anywhere. A lot of this comes down to how you plan to shoot eg getting on planes, going for hikes or just getting out of your car. Don't go overkill with respect to size.