Ram mount makes the most solid mounts. Made out of military grade metal. http://www.amazon.com/RAM-B-166-UN10U-Suction-Mount-Universal-Phablet/dp/B00DI2W24O/ref=sr_1_cc_2?s=aps&ie=UTF8&qid=1445302725&sr=1-2-catcorr&keywords=Ram+mount+large
RAM X-Grip Large Phone Mount with RAM Twist-Lock Suction Cup Base https://www.amazon.com/dp/B00DI2W24O/ref=cm_sw_r_cp_apip_Q4rySPoasi2na Ram mount. Works well, doesn’t break the bank
Ram Mounts is the BEST system you can buy, its modular and completely configurable. This is what I use. I also use a Ram Mount on my motorcycle and it works great.
https://www.amazon.com/RAM-RAM-B-166-UN10U-Suction-Universal-Phablet/dp/B00DI2W24O
I've always been a fan of the RAM mount:
Ram x grip xl had it for a few years, only falls off the windshield on really hot days when the car has been sitting a while
https://www.amazon.com/dp/B00DI2W24O/ref=cm_sw_r_cp_apa_i_0JTsFb4WPDWDA