full hdtv tuners cost a bomb in india. only way for you is to import them through iccworld (cheapest) or shopandship if you have an account with them. i have the
hauppauge 1414 colossus tuner. captures brilliantly, but has bugs which the company hasnt yet taken care of yet. it does not switch between dolby 6ch ac3 and stereo audio properly in its software interface. it just tunes to one format. switch from one hd channel to sd channel and you wont get audio. the hardware decoder decodes and encodes perfectly. no complaints on that ground.
it cost me 8.5k when the us-inr rate was 43 about 1 and half yrs back. it costs 15k officially here in india. so it depends on you whether you really require a hd tv tuner. imo, hd channels in india are not worth recording due to too many self promotions in them before, during and after the tv program is broadcast. best option would be to get airtel's dvr or buy the tv serials you want on bluray.