Good Discount Travel Agents In Bangkok For Tickets To India (Business Class)?

Hi all, I am up in Chiang Mai. Can anyone recommend an agency in Bangkok that may have particularly good fares for business class travel to Delhi, India from BKK? With all of my luggage the extra baggage allowance will make up for most of the fare difference from coach.

Booking directly with airlines or online through something like kayak.com, the best one-way fares are $423 with Air India and $582 with Cathay for travel late Sep or early Oct. Sometimes agents can do better.

Would prefer Cathay if could get better price as they are #1 in my personal experience. Has anyone used Air India lately and found it to be good? I have not used them for a decade or more because my last trip with them was not inspiring to say the least.