Best Dressed?

I'm not sure how I feel about this one. I read this post (John MacArthur on Respect in the Pulpit) this morning, and while I understand his point, I tend to disagree on the "why". Now, granted I wear a tie on Sundays about 90% of the time. But I've often wondered if our "best dressed" is necessary to come to worship. We've had at least one person come to our church where their Sunday best was the only thing they had. I wonder if part of my role as pastor isn't to communicate that all are welcome to come and worship with us. Perhaps that message can even be communicated in how we/I dress.

What do you all think?