I wear dressier for clothes for church on Sundays and wear business-type suits for board meetings and such so I can't speak to longevity after regular and daily use, HOWEVER, I too am a 5'4" pear shape. I've always had good luck with Ann Taylor curvy petite pants. They fit me well- not a lot of gaping around the waist with their pants (because as a pear shape, regular non-curvy pants either are too tight in the hips or gaping at the waist). As long as I stick to "curvy" they fit really well. And I've found the quality to be very good. In other words, no poorly sewn seams, no threads hanging off, usually lined skirts and jackets. Much of their stuff is machine washable too.
I agree with Ms. Pacman though, you have to be careful because much of their clothing has a slightly trendy bent to it. For example, there was quite awhile puffy sleeves were on everything. And all their jeans were skinny or their version of straight (which was almost as clingy as skinny jeans). But honestly, it's really hard to find true classics that cut out all the trendy bits. I've yet to find one. I love their Essential shirt, especially the sleeveless one. They are so comfortable and never wrinkle. They look great under cardigans and blazers.
" I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent." Mahatma Gandhi
"This is the ultimate weakness of violence: It multiplies evil and violence in the universe. It doesn't solve any problems." Martin Luther King, Jr.