I like Millers, and more than anything probably because I came from Mpix, and they are the same company. But I will tell you they have great customer service, their product is excellent, and they have a VERY fast turnaround! I have had to call in once for help with my business card, and they were great, the lady didn't hang up with me until she had my order in front of her, and was very helpful. And every time I order I either get it the next day, or the day after, and of course, with free shipping. Plus I just have my credit card on file, so they just bill it, and I just place orders whenever I want without having to do anything with payment, then I get a statement each month with all my purchases and how much was billed to my card - really works out great!! I'm sure WHCC does the same with billing, but I'm just letting you know my experience with Millers, and I'd vote for them!
FYI - I am just a portrait photographer though, not a wedding photographer, but I don't think that would change anything in this case