Do post pics and details of your new Lamy and the other fountain pens when they arrive.
I use J. Herbin Perle Noire and Platinum Carbon ink for black inks and Diamine Midnight for my dark blue ink. I import my ink supply once a year as I find this to be cheaper. If you do not wish to wait or don't mind paying the premium, you could order from Pens Avenue in Malad -
http://www.pensavenue.com
You could also try the blues and blacks from Sailor, Waterman, Sheaffer, Lamy and Pelikan at a William Penn outlet closest to you.
Amongst Indian inks, I primarily use Bril Royal Blue and Blue Back. Their black is more of a dark grey.
I will do a dip test sample of the blues and blacks I currently have at hand and post it here. This will take some time as I will need to clean the nib and feed after each ink.