too big?

As you know, my son is almost 15 months old, and I find myself faced with a problem. It's nothing major. It's to do with his clothes. You see, there are some moms who dress their babies like babies for a long time, and there are some who dress them like big kids fairly early. Thus far in Campbell's life, I'd say that I tended more toward the babyish clothes with the occasional really cute big kid outfit. For example, the picture above is what he wore yesterday. Clearly a big boy outfit. Let's face it, he looks like a teenager.
And so now that he is getting older and becoming a toddler, I'm faced with the question of which way to lean . For one thing, he is so tall that one-piece outfits only fit him for a short time making them not quite worth the money. But on the other hand, I'm not ready to dress him in big boy clothes just yet. Church time is especially challenging because it seems there is no in-between. It's either little baby knee socks and jumpers or big boy kakhi pants and sweaters. Where are the compromise clothes? I don't think that girls have this big of a problem because I think there are more in-between things for them--actually, let's face it, there are just more girls' clothes in general.

And so, I guess my question to you all is, which way do you lean? If you don't have kids, what is your opinion on the baby vs. little kid clothes issue. I'm very curious to see the answers. Thanks for the help.