Avantasia's Metal Opera's - normal or gold edition

Some context, I bought the Gold Edition many years ago as that was the best value version, though I was always a bit put out that it completely lacks the original artworks. I came into the originals as well when I bought someone's whole collection off of ebay a few years ago. 

Until now I have just kept both versions. That becomes less of an option every time I buy a new album, with ever decreasing space for storage, which has already resulted in my collection being split into a main and secondary collection shoved in the spare room recently. And frankly selling one version could finance something I don't own two of. 

There's not much resale vale difference on ebay between the two originals sold together or the one Gold Edition, so that doesn't really swing it over which ones to keep. 

So if you were me, which would you keep?

The originals have all the original artwork, which I like. The Gold Edition is done up like a hardback book. There are bonus tracks on the discs of the Gold, but they aren't great added value to the album's standard versions. The whole idea of a Gold Edition is that it is a bit more special, but I never felt this set was as special as it should have been. I did pay much more money for the Gold originally, more than I could probably get back out of it, but the originals work out as having paid less than 20p each for given the price paid for the job lot, most of which I've long made back by selling the doubles. 

I'm really torn on this and would like people's opinions. I'm selling one or the other, so don't say 'both'. You won't be being helpful. 

The other two have just been put on my ebay for sale. Starting price £5 each +P&P of £1.75.