Not sure what kit is available where you live, but I've had good dealings with this place:
http://www.theacousticmusicco.co.uk/
They sell stuff from many smaller, low-volume builders; the sort of guys who work from workshops rather than factories. They give useful descriptions which will help you match an instrument to your needs, rather than the standard marketing junk that most places have. Guy who runs it seems like a nice person too.
However, they also sell from some factories too. I got an A-style mandolin manufactured in China by "Kentucky" for a relative and it's really nice. They'll get the hand-made mando next year if they keep playing the thing
The good news is that most of the principles with which one can select a good acoustic guitar also apply in the selection of a good mandolin. Similar factors apply with the materials, designs, and construction methods.
Sadly, my fingers are just too large and clumsy for the mandolin