I love this band and think it would be a shame to reduce them to a greatest hits listen.
"Pretzel Logic" to me is absolutely flawless, every song is great. "Countdown to Ecstacy" and "Katy Lied" are also great, almost perfect, and I have a weird love for "Royal Scam". The first one and everything from "Aja" onward is all fine but lacks the bite of the ones above. For the longest time, the Dan just sounded like sterile L.A.-in-the-70s lite rock but the more I listened to it, the more I heard the superb musicianship, cynical lyrics and crystaline production.
You can do fine with a collection but you miss the overall vibe of the classic albums. History reeks out of those early albums.