I have spent my winters in Scottsdale the last 3 years, so I've come to know the area fairly well.
It really depends if you have a preference of what area of Scottsdale you want to stay in, and what you want to spend. It's big!
The Chaparell is close to the Fashion Plaza, and sort of nearby to Old Scottsdale. Older facility, though I have no idea if it's kept updated.
Just south of there on Scottsdale Rd. (closer yet to the Mall and Old Town) is the FireSky Resort, which is gorgeous!!!
If you don't mind getting out the area, further north is the Fairmont Princess Resort, which is an incredible property. Not too far from that is the Kierland Westin Resort.
About 15-20 minute drive from Old Scottsdale is where my condo located. We had visitors this year who we booked into the Orange Tree Resort. They were offering great deals because it was new management, and newly remodelled, right on a golf course, with little condo style units.
There's a few suggestions for you. There's certainly more around.