I think the only ABC song I know is "Look of Love"
which I guess was the biggest hit from that album. I like it so might be able to get into the album though while I've definitely warmed up to new wave and sythnpop in recent years, it still generally seems like I'd probably want to just get compilations by most of these artists. I finished "Substance" (the 2 disc version, obviously) and wasn't exactly blown away but still enjoyed it more than I expected. Very solid for such a lengthly comp. Good tunes and a cool sound which has aged better than much of their contemporaries.
One of my friends is all about Ultravox's "Ha Ha Ha" album so I've heard that one. Remember basically enjoying it but my memory of it's not particularly strong