if you have made up your mind for nxt then i will suggest you to go for maguires ultimate paste wax it comes with a foam pad and a micro fiber also in a very good packing.and its a newer version or u can say upgraded version of nxt 2.0.
if you really want to go crazy with the shine then go for a full detail session wash clay bar skip the compound ur car doesnt need that machine polishing by a Da polisher.and then apply any sealant and top it up with a natural carnuba based wax. u can skip the sealant if u dont have it. and go directly with the wax.
if ur tight on the budget then i will recommend you maguires gold class. but it catches alot of dust.and in this heat it melts like custard...