Of course, it really depends on the horse and on how their neck was shaped. All those horses that Wild_Spot posted had a slightly arched or crested neck. IMHO, that is a necessity for them to pull off a roach. If they lack muscle or if they just have a very flat neck (WP horses for example), or even horses that have prominent withers, they could never pull it off roached close. The only option for an animal with a flat neck is to roach it on a gradient; short at the withers and poll and arched in the middle. That is what we do with our mule teams because it makes their necks look bigger and stronger. Mules are pretty notorious for having a flat neck. ;p
It is kinda hard to tell from those pix but it is very similar to how Fjord horses' manes are trimmed.
I prefer a horse with mane, although there are some horses who just look better without it. We had a QH cross when I was growing up who looked fabulous with a roached mane But for the most part...I'll take a mane, even a short pulled, or banded mane.
First, I'd have to ask, why? Just for looks? I think my paints and TB look GREAT with roached manes, but I love the wild, "just climbed off the mountain" look.
You need to ask yourself about your horse's climate and contact with flies. The main reason for the mane (no pun intended... LOL) is firstly their heater and A/C, and secondly, protection from pests. If your horse is in a really hot/cold climate they must have good protection from the elements. If the flies situation is bad, you might reconsider.
Put up a picture of him on the critiques section and ask there! You might get some different answers!