Both Indira Nagar and Faizabad road are good areas to invest in Lucknow. Although considering long term benefits and price performance ratio, I would suggest Faizabad road more than Indira Nagar. Another reason is that prices in Indira Nagar are a little too high for me although that's a premium one pays to live close to the city. Faizabad road may be slightly further but it has its advantages of clean housing societies that are well planned and within the budget for majority of us. If you are seeking to invest only for a short term, still Faizabad road gets my approval.
Trans Gomti region including Gomti Nagar Phase I, Phase II, Extension and Indira Nagar all have a lot of real estate activity attracting buyers. Divided into well planned sectors and phases, the intrinsic advantages of these areas are well planned roads and civic infrastructure. Along with newly constructed apartments with all amenities. The real estate prices in Gomti Nagar area have already witnessed a 5 to 10% increase over the same period last year. A number of well reputed pan India builders have projects in Gomti Nagar and extension area. You can check out DLF and Emaar MGF apart from local developers that can give value for money.