My first rev solenoid drivers/LED drivers are all through hole. I thought it would be easier to build. I have regretted that decision almost immediately. I can populate surface mount boards much faster and the quality is a lot better. (Of course, that might be due to the fact my soldering ability is only good enough for 1970's era pinball machines). For my next rev, I'm expecting to do through hole only for the high power connectors, and the high power FETs. Everything else is going to the surface mount.

The other thing to remember is that the surface mount parts are significantly cheaper in most cases. It drops a good 20-30% off the cost of parts, smaller boards which saves more money, and then takes me less time to build the boards (depending on the card, it is anywhere from 1/4 to 1/2 of the time to populate the boards). If you are sending boards out for populating, it saves even more money.