Good coilovers under $1k do not exist, unless you just want to slam your car.
Lowering springs and upgraded dampeners are:
1. Cheaper
2. Handle better (than stock or crappy coiliovers)
3. More comfortable for a DD (e.g. when Koni's are set to full soft, they have arguably a better ride than the stock dampeners)
I ran TRD springs and Koni's and I was still able to fit (with ease) 17x9 +35 wheels. Looked pretty decent in my opinion as well.
On an related note (sorry for the shameless plug), I will be selling these TRD springs (and front/rear sway bars) and Koni's (koni's will be on the car until Spring though). Price? Less than 1k lol. Hit me up if you're interested.