The problem with dressing for a wedding
A groom is not dressing for one event. He is dressing for four or five, each with a different light, a different crowd and a different level of ceremony, most of them photographed. The mistake is treating them as one decision, or as five unrelated ones.
The workable approach is to decide where the presence goes. One function carries the statement; the rest are quieter and comfortable.
Mehendi and daytime functions
Outdoors, daylight, long hours, people sitting on the floor. This is the wrong place for a formal groom silhouette. A relaxed sherwani with a soft shoulder and a generous lower body, or a relaxed bandhgala, will photograph well and still let you move. Keep accessories to almost nothing.
Sangeet
Evening, loud, and you will be on your feet. A bandhgala works here because it is jacket-length: you can dance in it, and it does not read as a costume by the second hour. An Indian evening jacket is the other good answer.
The main ceremony
This is where a sherwani belongs. Knee length, standing collar, a subtle waist and a clean chest. If you want ceremony, get it from the cut and the proportion rather than from covering the chest in decoration — a garment that only works while it is loaded with accessories is not a garment that fits.
Two things decide whether it looks right: the shoulder and the collar. On a long coat both are visible from across a room.
The reception
The reception is the function that takes presence best, and it is the one where Western and Indian both work. A statement dinner jacket, a double-breasted tuxedo, or a lean evening sherwani will each hold a crowded room. Choose one, and keep everything else restrained.
The morning after, and afterwards
Worth saying out loud: the pieces you will wear again are the jacket-length ones. A bandhgala returns for the next family function; a reception dinner jacket returns for the next black-tie invitation. A ceremonial sherwani, honestly, usually does not. Spend accordingly.
Timing
Each garment is fourteen days from its measuring visit, with one fitting at day eight. Measurements are taken once and kept on file, so a full wedding wardrobe needs one visit rather than one per garment. Start at least a month out if there are several functions.