As far as I know, dimensions of all PSUs are same. So you may fix any brand of PSU to any cabinet. I think it is true even in case of server PSUs. But all PSUs need not be compatible with all Mobos.
check the form factor of cabinet, psu and motherboard, normally decent stuff is ATX, so should be absolutely fine, if you get something micro atx and other atx, then I am not sure
Forget about VIP psu, stick to antec or cooler master in india, consider zebronics oem (only skyhawk ones) as well