M.M.
With jeans, you get what you pay for - 100%.
So my suggestion would be to invest in a few pairs that might "break the bank", and will last for years without wearing holes in them.
Seven for All Mankind has fits for every body, and a petite line. You can find them in Macy's, Nordstrom, etc... They are anywhere from $158-$300/pair, but you can ALWAYS get them on sale for ar0und $100.
Go the store, find the fit/style that you like, and then order it online and on sale. Seven's website always has a sale, and then there are tons of discoun sites as well.
For me, Dojo is the fit I love, but there are many.