I wear 5740G on a daily basis, as it’s so versatile and also kind of robust.
Regarding the profile, both 5740 and 5811 are similarly thin. They should easily slip under the cuff. My wrist size is 17cm. With the lug to lug distance of around 45mm for 5740, you should carry it very well too.
The only difference between the two is perpetual calendar vs three hands plus date.
Can’t be wrong with either one. Wish you get yours soon and please share wrist shots with us.
Cheers, Henry