Lg is a very good manufacturer of microwave ovens and LG MC2144CP 21-Litre Convection Microwave Ovenis one of their best product. It comes with a capacity of 21 litres.
It has many features like Power convection, stainless interior and multi functional cooking, 76 auto cook menu and 48 Indian auto cook menu, Stainless steel cavity and keypad control type, Cooking completion alarm, 5 power levels and child lock.
You can get it for around Rs. 12000/- easily from market as well as offline. It comes with 1 year warranty and the after sales service of Lg is very good so it is a very good option.