Boy you guys are making this sound dire. You'd think the most high-regarded manga, like, ever would be able to nab itself a really good anime adaptation.
Are any of the animes really worth seeking out? Are the movie good apart from the cgi? Or should I just get ahold of the manga or forget about it?
Believe me, this anime is dire. It honestly has all the quality of a video-game based movie, and not one of the entertaining ones like Mortal Kombat 1 or Silent Hill 1. It's more along the lines of Silent Hill: Revelation, or one of Uwe Boll's films. The only way I'm getting some enjoyment out of it is by treating the whole thing as an unintentional joke.
The 1997 Berserk anime, while rather dated in its animation, is actually a decent show. It has good direction, good pacing, makes some deviations but still stays mostly faithful to the material of the manga that it adopts. Most of all, it actually manages captures the feel and tone of Berserk, which this anime completely fails at. I'm talking about the atmosphere, character development, and emotional quiet moments, all of which are completely absent from this anime but are done decently in the 1997 one. My recommendation would be to watch that show and then read the manga from beginning. I've never seen the movie trilogy, so I can't comment on that. I somehow doubt it's worse than this anime, though.