from what ive been recommended by everyone, go second hand, markers dont hold their value, so when people resell markrs theyre at a fraction of the price and for the most part, theyre in awesome shape! since theyre durable and noone in the right mind would damage their own marker, so theyre usually well looked after, just make sure you buy from reliable people when youre spending over £40.
get an ion, second hand, then you end up getting one for a cheaper price, or well upgraded, like a blackheart board or something.
if you get a good hopper, a lot of people have recommended the empire reloader b, since it doesnt have "eyes" in the feed-neck, so if paint bursts in the hopper, its easier to clean and if you really want it to, itll work through!