LightningYu: i'd like to know, even if it might not be onpar with the Original Vanilla Games, do you think for my purpose it will be more than enough and enjoyable?
Hard to say. Most of the people who enjoy the Enhanced Edition didn't really play the originals much, if at all, and so didn't feel as betrayed or disappointed by the missteps that Beamdog made. You, as a fresh viewer will ultimately be more inclined to like it because you don't have a frame of reference to understand what about the game makes it bad.
For example, most of the "Enhanced Edition" are a collection of free mods that we the gaming community had been working on for decades. Beamdog appropriated them all, slapped an "Enhanced Edition" sticker on them turned around and sold them to the consumer. Very little of their content was unique at release, and most of what is unique most people don't want (see: outlines, etc.)
Next, despite the fact that this game had been running smooth as butter for decades, Beamdog managed to make their version nigh unplayable for several months out of release. You were confronted with major game-ending bugs over and over and over. This is what came of them stealing other peoples' code and being too incompetent to implement it right. At its peak there were over six hundred noted and unaddressed bugs on their forums. Even now if you swing by you'll see dozens of them.
This next point really sticks in the craw of a lot of people around here. The Enhanced Editions didn't sell too well, being bug-riddled messes that were charging you for free fanmods. And so Beamdog did customers everywhere the dirty of forcibly bundling the originals with their Enhanced Editions so you could no longer simply buy the originals on their own. Now they could safely pad their sales numbers and claim that their remakes weren't the immense flops that they were. When people got outraged and protested, they bald-faced lied and blamed the distributors like GOG for the change... until they got caught and disproved. I don't remember them ever actually apologizing for being scumbag liars in that situation, but by this time no one was surprised by the lows they'd sunk to. Their forums were already draconian hellholes where criticism and wrongthink were punished with lifetime bans.
Lastly, and most damningly, they just couldn't leave the base characters and content alone. No one wanted "story upgrades" and no one wanted "NPC updates." Just make a newer system for us to enjoy, yeah? But Beamdog went ahead and added a ton of extra dialogue to the NPCs that ultimately changed their core personalities. It was soul crushing to see characters I'd grown up with spouting new lines of dialogue discussing racial intolerance and oppression. Beamdog fans will claim that Beamdog only added new lines, but didn't delete existing ones, therefore they didn't "change" the NPCs. I could never make sense of this reasoning. Would rereleasing Casablanca with a new scene that had Bogart digitally dunking a basketball on the Nazi Major and then winking at the camera not be changing the film, despite them "only" adding content and not deleting existing footage?
Anyhow, all of the above is usually gibberish and unimportant to new players. If none of that bothered you, I say go for it. The damage to Beamdog's reputation is already done and they lost BG3.