I will assume you mean you're looking for an endgame PvP set, because PvP equipment fares very poorly outside of battlegrounds (as in, the secondary "pvp" stats it provides do absolutely nothing). The only reason I bring this up is because sometimes people are recommended to buy the gold-purchased PvP items for fresh 50s just because of their item level of 65, which is marginally better than the items they've acquired as quest rewards despite the nonapplicable stats.
Those gold-purchased items are not what are in your images. The first one is the prestige-purchased PvP armour for Exiles, I'm not sure what the second one is, and the third one is the prestige-purchased PvP armour for Dominion.
Anyway, the best endgame PvP items you can possibly get are just the prestige-purchased i70 blues from the <PvP Seasonal Gear> vendor, pictured in your first and third images (depending on the faction). These items' quality can be improved by "enhancers", as you can see in their imbuement, which drop from battleground bags and can be purchased from that same vendor. A fully enhanced/imbued prestige piece is best in slot.
Acquiring the prestige you need to get those pieces is easy peasy. First, buy a set of the gold-purchased i65 items, then slap in some superb runes to complement your intended role (Off the top of my head, I'd say use the Striker set for Assault, and Defiance & Alleviation for Support - DON'T worry about rune sets or rerolling slots until you've got your prestige gear. Use basics in the meantime), then buy some prestige flasks from the renown vendor and start queueing for random BGs! Also remember to pick up the battleground daily and some PvP contracts.
For some clarification, see the image below. This is from an Exile perspective, so specific names and stuff may be different on the other side, but the order of the tabs will be the same.