Recommended Controller board

Hi all, just getting into the Reprap printers, time for me to learn more.

So I purchase a kit to start my journey. Im wondering a few things:

Does it really make a difference what are the differences between controller boards i.e. Sanguinololu Ver1.3a Board vs a arduino mega.

is it worth buying multiple nozzles at first or just stick with a couple 0.3 nozzles.

Is the company geetech a trustworthy kit distributor.

And I apologize if this has been posted already, and if its in the wrong place havent used a forum in a few years

Personally I like the ramps 1.3" solder it myself job" but the ramps1.4 are OK with a lot cheap china on the market be wary of buying to cheap.. the J head mkV get a genuine and stick to .35 nozzle many get the .5 and soon out grow it. " not knowing where you are,,hot end.com. times are moving fast and all metal like the E3D,hexagon both are well priced.
So to recap don't be a CHEAP ass on the controller, hot end,stepper driver either off them will come back to bite you on the ass if you go cheap.