Which Trilogy of Stalker should i play the Enhanced versions or the older games?

Hi guys, a little insight about me of this game, is how i came here and loved this game.

First i played Stalzone (a.k.a. Stalcraft), because i didn't have the money to play the real saga, then after a long time i heard about Stalker GAMMA, oh men how i hate and love that game, and after that, i played Stalker 2, where i got the achivement to explore all the zone and about 500-600 hours on gameplay and waiting for the DLC

Now i want to play the trilogy after playing all those games, but i heard a lot of opinions about the Enhanced version has bugs and other problems.

And also i would like to ask, if you recommend to play a modpack as my first run, but a modpack that maintain the essence of the real Stalker, something like more weapons, better graphs.

Thanks for your help!