Don't reckon much at all of those, how about... http://www.ebay.co.uk/itm/Ultra-Racing-Front-Lower-Brace-Bar-Volkswagen-Golf-Mk4-4-Point-LA4-1271-/140802701468
You have posted Exactly the same link twice mate. They are a bit like a Audi s3 lower strut brace so quite good. A anti roll bar is totally different, sits on too of the sub frame and connects your two wishbones.
I wouldn't say you can have overkill Just make sure you get a nice big rear arb to balance it out but it will handle much better