I ended up getting the Scosche StuckUp 3-in-1 Universal Car Mount and honestly i am very satisfied with it. It only costs about 20 dollars at Best Buy so you will have some change left over from your 25. The suction is really heavy duty and it hasnt fallen off once even when it gets hot in the car. Since you have a thick case, the adjustable arms are a lifesaver because they actually reach around the edges and hold tight. I feel much better driving to Chicago knowing it isnt gonna fly off the dash while i am looking at the GPS. No complaints here, it works well and keeps everything secure without needing to mess with the vents. It is definitely sturdy enough for a bigger phone like yours.

Stumbled upon this discussion while looking for gear... Like someone mentioned, the weight of a Moto G with a rugged case will definitely wreck most vent clips. If you are heading to a store today, here are a couple of alternatives that actually stay put:

• iOttie Easy One Touch 5 CD Slot Mount: This is a solid option if your car still has a CD player. It uses that slot as a base, which is more rigid than a vent. It handles heavy phones without vibrating too much. Cons are it might block your radio display or backup camera screen.
• SCOSCHE Universal Cup Holder Mount for Mobile Devices: This fits basically any cup holder. Its very stable because its low-profile and wont fall off the windshield. Downside is you have to look down away from the road for maps, which depends on your dashboard setup. Both usually run about 25 bucks at Best Buy. Tbh the CD mount is usually the better call for navigation.

Man I wish I found this thread sooner. Would have saved me so much hassle.

honestly i totally get the worry about the vent snapping. if your phone is heavy and the case is chunky, those thin plastic slats in the car definitely struggle. ive had one sag so low i couldnt even see the screen before... not ideal for a highway trip to chicago. since you are hitting up best buy today with 25 bucks, i would skip the vent clips and go for a suction mount on the dash or windshield. it handles the weight of a rugged case way better. here are two decent options that are usually cheap:

• Insignia Dash/Windshield Car Mount for Most Cell Phones - this is basically the budget king. the arms spread pretty wide so it should fit that chunky case no problem.
• Scosche PowerMove Universal Dash and Vent Mount - if you find this one on sale, the motorized arms are actually kinda nice for holding onto thick phones. just make sure you wipe the dash with a damp cloth first so the suction actually sticks. safe travels!