Looks like you have found some very good deals.
It's very hard to order parts in India isn't it? Some poor fellow has been after me to ship him parts but your postal regulations make me nervous.
Ideally you would get an i7 920 and an X58 motherboard, but these would cost you more. Your AM3 solution is a sound budget choice... but then there is the SSD.
Really, you could have better performance by taking the money from the SSD and putting it into the CPU. An SSD is not great bang for the buck just yet. An X58 board would get you the option of full crossfire or SLI while also getting you into the faster i7 920.
All three platforms should have the same longevity.
-An i7 860 build on a P55 board would be my idea of good bang for the buck and enough CPU to handle anything for the next 4 years.
-an i7 920 build on an X58 board would give you the option to CF or SLI and again would be all the CPU you will need for a long time.
- The AM3 route you have chosen is a bit weaker to start and will only do CF, but will probably see some CPU upgrades that are worthwhile as well.
To answer your RAM question, this is nice DDR3 that will work in your AMD build as well as i5/i7.
http://www.newegg.com/Product/Prod [...] 6820231279
And finally, I own a 750TX and it's a great PSU. I probably wouldn't choose one today. There are newer more efficient models out that are quieter now.
850TX
http://www.newegg.com/Product/Prod [...] &Tpk=850TX
TP-750
http://www.newegg.com/Product/Prod [...] 6817371022
One of those would be my pick.