Personal preference really, I like the CDTs better. Warmer, softer set. Very good for the price. If you go the Infinity route, it's not too much more to get the KappaPerfects. Depends totally on your personal taste and budget, but all are great sets.
CDTs aren't as laid back, but still very accurate. The Classics wouldn't really compare as well to the Dyns as the HD and Eurosport CDTs would. CDTs are all over online, www.woofersetc.com has them. Dyns are not cheap speakers, but they're on that site as well if you want to do a price comparison.
The Eurosports are actually more expensive than the Dyns. It's all in your opinion. I like both, and think you should listen to them and formulate your own opinion. HDs are very nice and cheaper than the Dyns. Softer tweeter on the HDs compared to the Eurosports. Dynaudios are the softest still.