May I weigh in? I bought an ECB and was so frustrated the first few times I used it, I was ready to throw in the towel on smoking.
I used my Weber OTS 22.5 for everything, and I still believe it is the most versatile cooker in the world. Once you realize how little charcoal is needed to get to smoking temperatures and how to set it up for indirect cooking (hint - coals banked on one side only), there isn't too much you can't do with a Weber Kettle. I mean, come on, the thing is so simple that it's dang near perfect.
Still, I couldn't stand having something that I couldn't make work, so I did all the standard mods on the ECB. The result was that now I could actually make edible food on the thing but it still was frustrating.
Last September, my office staff and wife gave me an 18" WSM, and my BBQ-ing and smoking life changed! I cook on it about every other weekend, and have never cooked a bad meal on it. Each smoke is better than the one before and I learn more and more about the grill. I start on Wednesday thinking about what I am going to smoke or bbq on the weekend.
Be patient, watch ebay, Cragislist and the local classifieds. Like the Weber Kettle, the WSM is dang near perfection and smoking on it is a pleasure in and of itself. It only gets better when you get to eat the meat that came off of it!
Oh, the ECB? I still have it. I put the legs on the outside, removed the charcoal pan, substituted a Smokey Joe as the firebox, and use it on occasion for chicken and pork tenderloin, especially if I am cooking only for part of the family. It will now hold a steady temperature long enough to complete the cook - I attribute that to the Weber influence!
Pat