Garmin 520 is a great GPS unit, and compatible with ANT+ device. You can use the same ANT
+ devices on Zwift. Check out how here.
These rollers are great for travel and I keep a set at my office. They fold for easy storage and travel to race starts.
Cool to cold weather gloves. The leading edge of these gloves are wind-proof when your hands are on the hoods. Also, the first two fingers have these really cool cut-outs that make them easy to bend for shifting and braking.