Slaved your argument that you can use magic vestment to up Bracers or armor's enhancement bonus has several fatal flaws, not the least of which is this:
According to RAW
http://www.d20srd.org/srd/equipment/goodsAndServices.htm#adventuringGear
Your normal clothes options are delineated here:
"Assume a character owns at least one outfit of normal clothes. Pick any one of the following clothing outfits: artisan’s outfit, entertainer’s outfit, explorer’s outfit, monk’s outfit, peasant’s outfit, scholar’s outfit, or traveler’s outfit. "
No starting outfit includes bracers. Therefore you cannot have bracers are part of your normal clothes and magic vestment can't target your bracers.
According to RAW
http://www.d20srd.org/srd/equipment/goodsAndServices.htm#adventuringGear
Your normal clothes options are delineated here:
"Assume a character owns at least one outfit of normal clothes. Pick any one of the following clothing outfits: artisan’s outfit, entertainer’s outfit, explorer’s outfit, monk’s outfit, peasant’s outfit, scholar’s outfit, or traveler’s outfit. "
No starting outfit includes bracers. Therefore you cannot have bracers are part of your normal clothes and magic vestment can't target your bracers.