Welcome to the forum Simmi !
An AV setup for your husband 'sounds' like a perfect gift and if he is anything like us audio/videoheads then he would be thrilled by your gesture.
Having said that, the gear that you have in mind isn't really the best that 90k can buy. In fact this combination is available for 70k on the following site:
JBL Cinestyle 30 Home Theatre Price - Buy JBL Cinestyle 30 Home Theatre Price in India, Best Prices n Review
Before we go into this any further you might want to tell us more about the future usage of the AV gear- would it used mostly for movies/music or a combination of the two? Whatever the ration of music: movie may be I would recommend that you steer away from the above. As for the answer to why people prefer mixing and matching components from different companies - its simple.. we want the best possible setups in our respective budgets.
The best AVRs are manufactured by companies, who rather unfortunately, don't manufacture the best sounding speakers. For example the best AVRs are supposed to be from Yamaha, Denon, Marantz, NAD, Pioneer, Harman Kardon and Onkyo (in no particular order) but none of the above are known for their speakers(apart from Pioneer but more about that later).
For the best sounding setup one should keep the ration of 60:40 in mind.. the 60 being the speakers and the 40 being the AVR. Assuming your budget is around 1 lakh you should be looking at an AVR that costs 40k or lesser and that gives us several world class AVRs:
Yamaha 671
Denon 1912
Onkyo 609
Pioneer 1021
Marantz 5006
They should be available for around 35k. Now they should be paired with 5.1 speakers( 2 fronts,2 rears, 1 center and the subwoofer) for which the allocated budget is 60k in this case. You might want to look at this thread in which we have discussed the options for the best speaker system under 50k.
http://www.hifivision.com/speakers/23682-list-best-5-1-speakers-below-50k.html
You may already be familiar with the difference between floor standing speakers and satellite ones - the floor standers provide a better effect but they occupy space. If you were to ask my personal opinion then I would say go for the Pioneer SP-PK21BS ( satellite speaker version) or the Pioneer SP-PK51FS(with two floor-stander speakers in the front) in combination with the Yamaha, Denon or Pioneer AVRs that I had mentioned above.
It might take a bit of work on your part to finalize the setup but then that would be one perfect gift that your husband would never stop thanking you for
Happy hunting !