Well, those were off the top of my head mostly, so it wasn't so bad
It depends, some of those are old, some of those are quite recent. For instance, Prince of Tennis is a tiny older but there's the newest season that came out recently and they are working on the next one right now. So you could say it's pretty actual. Also, there's only so many animes coming out per year. I've mostly singled out the good ones or the ones I thought were interesting.
Sadly, I don't think there is a higher definition of texhnolyze... that sucks and I found it annoying too, but I still got through it. A lot of the pictures are quite dark and the colors meld together really well, so it's not as bad as it could be.
Some animes in there are must-see though, and and most of them actually got some pretty decent pictures, and the only hint that they're older will be the lack of panty shot and sometime less vibrant colors.
Also, some of them are not that old; for instance Spice and Wolf is 2008-2009. Not that old. And considering you've watched Dragon Ball Z (1989 - 1996), I don't think it should be a problem