Love the LL Bean dresses from a PP.
We get a lot, too much really, of clothes for DD from a friend. I have noticed that lately the clothes are getting to be a bit, meh, older looking than I'd like for DD, so I am keeping an eye on what we get from that friend and keeping the simpler shirts/shorts/jeans and giving away the rest. I just am not a fan of half shirts over tank tops for the 5-to-6-year-old set. And shoes with heels? YMMV, of course. I still like Osh Kosh and Carters for DD. Carters tops seem to be well made and hold up against my messy eater's spills. Once in a while we'll go to H&M, Old Navy, the Gap for sale items if we are near a mall. H&M has super cute, age-appropriate dresses that aren't too frumpy. Lands' End sometimes, same for LL Bean. Their clothes always seem so boxy to me, although that shape does still work on DD's body type for now.
We've had good luck with leggings from Basic Brilliance in the past, when DD was a toddler. I haven't looked much but also haven't found any leggings in stores we shop (Target, Kohls, etc.) so will likely turn back to BB for some new pairs this autumn. I plan to use DD's old pairs on DS this fall, especially under snow pants. They are so much easier to slip on over leggings than bulky jeans or cords! http://www.basicbrilliance.com/girls-cotton-leggings.html
For shoes, we did See Kai Run until this year, when I just couldn't justify the wear and tear vs. the price. DD just got a pair of what look like pretty durable, and are washable, sneaks from Stride Rite. After having to return a pair of sandals that just plain broke after a few weeks of wear and having the fabric rip out of the toe of a pair of not-very-old sneakers (both Circo brand from Target) I am less likely to go cheap on shoes for her since she is hard on them more now than when she was younger. (Or we just picked the least-well made pairs at Target!).
Lots of family/friends have given us hand-me-downs for DS, and I have a good amount of gender-neutral stuff saved from DD for him. I'll probably approach his clothes/shoes the same way: spend on shoes more than clothes, except for winter coats. We need good quality winter gear here to ward off cabin fever! It sounds ridiculous to talk about Columbia brand winter coats for toddlers, but we do a lot of winter hiking, and it keeps them warm! Campmor.com has great off-season deals.