Don ot spend £-400 on sealant.

Buy some quality polish and wax (say £3-40 worth) or get it valeted for £50-60 every 6 months - both are better than paying £3-400 upfront

For new paint, a non-abrasive sealant such as Turtle Wax Platinum Extra Gloss would be fine if you wanted to further protect your paintwork. I applied it to a new Audi A6 last autumn before the harsh winter set in. The paintwork still beads water as if the sealant had just been applied. In the spring I'll polish the car with something like Autoglym Super Resin polish and then apply another layer of Platinum Extra Gloss as a final step. I've found it to work really well, keeping the paintwork shiny and proving very durable on a range of cars I've looked after over the years.

I suppose it depends how much you want to spend etc., but I think sealant is likely to suit you best. You can get good sealants for less than £20.

I've used Zaino Z2, it smells nice, is easy to use, but I put a wax on top of it, so it's hard to comment on the finish. If you want durability, and don't want to spend huge amounts of money, then a sealant like this should be a good buy.

The price of wax varies a lot. There's probably not much point spending loads of money unless you're going to prep the paintwork correctly with polish.

Giving the car a light polish before applying the wax/sealant is likely to make quite a big difference too.

should i get paint sealant or just good wax on my new car?

Depends on the colour, how often you can top it up and how much time and money you want to spend on it. Autogylm SRP and ERP are pretty good, or their HD wax instead of the ERP.