I actually enjoy the wetsuit. If im diving Ishould be wet....after all im i the water....
And believe it or not I wasnt cold at all. The 50 degree water was kinda nice.
Oh, that's right, I forgot you are still in the temperate zone!!!
I stayed with the wetsuit down to about 40-45 degrees, but the drysuit allows you to go even colder (if you desire).
Another advantage to the drysuit is that you will stay warmer and conserve air, allowing longer dives (providing you're diving at a depth that accommodates the additional time). If you are calling the turn around due to air, not time, the drysuit will help. PLUS, nothing like finishing a dive, running a towel your hair, and heading to town without that oh-so-fragrant-it's-not-my-normal-smell-I've-been-in-a-wetsuit-odor!!
Actually, if you want to get a dry hood, you don't even need a towel for the hair!
Also, the drysuit allows you to dive in locations where it is REALLY inconvenient to exit the water and
strip to get dry and change or deal with wet clothes on the ride home.
Finally, there is the cost factor. Drysuits are much more expensive. You can
easily plop down $2500* for a really nice suit. With an investment like that, you'll HAVE to dive more just to show your economic genius! "You know Mom, I
did pay a lot for this suit, we can't have it laying around and not earning it's keep now can we??

That would be a
foolish waste of money! YOU raised me better than that! Nobody calls
this family foolish and gets away with it, huh, Dad?"
We ALL must sacrifice and do our part to strengthen the economy. Make your contribution this way!!
*DISCLAIMER* I usually just rent mine here in Estonia as an ENTIRE equipment rental including 2 tanks for the whole weekend runs about $30!! However, I did patiently monitor eBay for about 4 months and found a great suit for $250.