My wife and I are newly retired. We live in Seattle, WA and love the road cycling opportunities here, but would like to spend part of the winter where the cycling and weather are good. We especially enjoy riding riding paved, mixed-use trails and not-too-hilly, quiet, low-traffic streets. We also enjoy relaxed group rides and usually ride about 30 miles at 15 mph. We were thinking about cycling in Arizona or So. California. Suggestions?