For the SVK, it's essential that the carabiner is light and easy to use. Otherwise, it quickly gets on your nerves switching every few meters. BD Easy Rider undoubtedly has the best carabiner for via ferratas. I have it myself. If buying again, I'd probably go for Iron Cruiser. It's almost as good but 20 eur cheaper.
The BD might bother you with a slightly larger and heavier "pouch" but in practice it doesn't matter. Other makers have smaller pouches but heavier and clumsier carabiners. No doubt worth paying a bit more for BD Iron Cruiser or Easy Rider.
For safety, the most you can do is check the SVK per manufacturer's instructions. Check production year and lifespan. And see if there was any recall
http://safety.theuiaa.org/front/front_search_list_recall.php (Energy absorbing system).
If the harness doesn't fit well, it's throwing money out the window. Not worth buying something that chafes etc. Especially for long via ferratas. In your case, I'd definitely go for a women's-specific harness.
Ideally, leg loops open so no need to pull boots through. And great if it has a clip at the back for attaching elastics.
If you're from Kranj, go to ProMontana to check harnesses. They've always given me 20% discount on nice request. Say
http://www.promontana.si/oprema/plezalna-oprema/plezalni-pasovi.html?spol=451 Especially that Puma Lady harness is from last season so wouldn't take less than 20% off. Or something like that
http://www.iglusport.si/zenski-pas-plezalni-primrose-sa/3 For 50 eur you get a super comfortable harness.
Helmet needs to be light and ventilated. One you put on and forget you're wearing it. If buying again, probably Mammut Rock Rider. In your case try Petzl Elia (285g).
Half Dome isn't exactly a gem among helmets.
Price difference between OK and SUPER is maybe 20%. Especially if you haggle for discounts.
This BD kit is down from 200 eur to 140 eur. If you take
BD Iron Cruiser = 80 eur + 50-60 eur harness + Petzl Elia 53 eur. Comes to less than regular BD kit price without discounts. If you haggle more, close to the discounted kit price.