Had some excellent meals at a Thai restaurant called "Dang" on Rat-u-thit road.
A Thai girl took me there for lunch on Day 1 of my trip
Opposite the PS Hotel (ie. near C&N Hotel), about 100 metres north of Bangla Road.
Busy eatery, friendly and fast service. Phad Thais for 50Baht (very nice!!), fried rice with chicken for 40 baht, most other dishes around 60-80 Baht mark. Nice refreshing juices too - for 30 Baht each.