27" rotary monitor vs 34" or 38"normal hrz monitor

[tommycoins98]

hi folks,

i have this question before to make a new arcade cabinet,

i dont know what type of arcade dual res monitor to buy,

because in my city only sale27 " and 34" 38" with the arcade dealer

if I put a 27 " i want to make a rotary(its to hard to do it that),this its a good idea or its a litle hard to do it that, its a great option to get a decent image(dot pitch) in vert games or Its a better idea to use a 33" or 38"
in horizontal position mode(normal mode mount)
if I use a 33"inches monitor i can get a good size picture to see vertical games in a rectagle(such as 25"monitor in verttical mount)and with a 27" i get a 20"image in vertical position

I have a trident blade3d with a 20"arcade monitor

which its the best option ,take in count

dot pitch
rotary (hard to built,size,lbs,etc)
if I use33"or 38" monitor mounted in normal position,
which picture size i get in a litle rectagule screen mode to see vertical games
options and example

thanks and excuseme my
english                                  
                                         tommycoins98