the magn ballasts are less efficient, so higher running cost
but, yeah, for 1st time perso, why not
well the reason why not is because if a shop offered you a trade-in of $500 for the gear you purchased 12m ago for $500, off your new bill of $800 say, you'd jump at it
you make your choice, we'll still like you
maybe you should invest in some decent peripherals, like fan, carbon filter, and do a fluro grow 1st up, then upgrade to hps with that notch on your bedpost
good luck