Congrats on your purchase! I think you did a wise thing by not reading too much into reviews and specs.
As SuhasG has mentioned, stands are a very very good idea. This is the first time I have heard of stone blocks for speaker stands - but anything stable and immovable/heavy is a good idea. It should also be of a height so that the tweeter is at your ear level in your listening position. I believe that one of the forum members, magma, runs a company called SoundFoundations - and they make some really good quality stands.
Speaker Stands - SoundFoundations
I think they are based in Mumbai which is not far from Pune. Personally, I would go with this option - this is real value for money, but this is only my personal opinion
What is your source? What speaker cables are you using? What cables are you using to connect your source to the amp?
I would actually say that for starters, avoid the DAC purchase. Instead, focus on speaker positioning and on the room. Basic thumb rules for speaker positioning (and this is really important!) are that the speakers and the listening position should form an equilateral triangle. Say, 8ft width between speakers, and 8ft distance between your listening position and both speakers. And experiment with a little bit of "toe in" - i.e. position the speakers a bit inwards so it faces you directly in your listening position.
Another thing that makes a big difference to bass is the distance between speaker and back (and side) walls. Nowadays we are mostly space constrained, but see if you can give anything more than 1ft. The more the better, generally speaking. The closer the speaker is to the back wall, the more boomy and flabby the bass tends to sound. And further from the wall, it becomes more tighter and more controlled.
As for the room, the more wood, furniture, and thick curtains and carpeting you have, the better (it absorbs sound and minimizes sound reflections). A sparsely furnished room will make the speakers bad. And a lot of people actually consider that the room makes about 50% difference to the sound quality! And often something we ignore.
And lastly, the one biggest factor in audio quality that I personally consider is the recording itself. Well recorded and well mastered songs make a night and day difference, and can make listening truly pleasurable or horrible.
Apologies if you knew all this or were already thinking about much of this. Just wanted to share some ideas with you to ensure a good listening experience
Edit: Here's a speaker positioning guide:
http://www.cardas.com/room_setup_main.php
http://www.cardas.com/room_setup_golden_ratio.php
