Your iPhone 6 is an investment, so protect with a case.

The iPhone 6 looks great. From the lines and curves to the metallic finishes, Apple's design team has done their usual outstanding job, but life can be tough for a phone. So, if you want to preserve your iPhone 6's natural good looks, you'll need a case strong enough to protect it. Even if you plan to upgrade, these cases should fit happily with the new iPhone 6s. Here are some of our current favorites, from full on multi-layer Iron Man-style armor to lighter, more precise impact absorption.

1. OtterBox Defender

The OtterBox Defender Series offers three layers of protection, ensuring your iPhone 6 can survive tumble unscathed. On the inside is a hard plastic core, which includes a built-in screen protector. Once assembled around your iPhone, the whole package is wrapped in a rubber skin for extra impact mitigation. The included holster can be clipped to stay open and act as a stand in a pinch. The iPhone 6 gets some splash protection thanks to plugs for inputs along the bottom, but this isn't a fully waterproof case. Still, the Defender Series remains a solid choice for those that live a rough-and-tumble lifestyle.

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2. TwelveSouth BookBook

TwelveSouth's BookBook is arguably one of the best-looking wallet cases available for the iPhone 6. The exterior looks like a well-worn novel, complete with real leather construction, but on the inside, you'll find plenty of room for your important ID cards and some cash. This series has been available for older iPhones, but new to the mix this time is a mounting mechanism so you can slip off the wallet portion when you need to. The underside is a soft-touch shell that still offers great protection. This also allows the outer wallet layer to act as a stand when you want to prop up your iPhone 6. For the convenience of taking just one thing with you when you head out the door, the TwelveSouth BookBook is a good bet.

See at Amazon

3. LifeProof FRE

The LifeProof FRE case manages to combine total waterproof protection with an extremely slim profile. A gasket sits between the two halves of the FRE case, and covers up the headphone jack, leaving power and volume keys accessible via pass-through buttons on the case. Touch ID still works just fine through the integrated screen protector. If one were so inclined, you could dunk your iPhone 6 underwater up to two meters for an hour. The FRE case is also certified to handle drops of over 6 feet. If you want a little extra power and don't mind added bulk, the FRE Power is also available, or you can run with the LifeProof NUUD, which offers all the same waterproofing, without needing a screen protector. Whichever you pick, LifeProof cases live up to their name.

See at Amazon

4. Tech21 Classic Check

Tech21 makes a wide range of cases, and one of their most popular is the Classic Check. This is a very slim case with easy access to keys and inputs, with the option for a clear build so your iPhone 6's profile stays fully visible. The Classic Check manages to maintain a high amount of impact protection through D3O gel lining the inside rim of the case. I've used boxing gloves with this stuff injected in the knuckles, and it's down right awesome how much impact they absorb. Nab a the Classic Check case if you want good protection with the bare minimum of additional bulk.

See at Amazon

5. Spigen Tough Armor

The Spigen Tough Armor offers well-rounded protection without a ton of bulk. It protects the iPhone 6 with a combination of a flexible core and a hard plastic outer plate. Inputs remain open with a little extra wriggle room to accommodate third party accessories. Additional rear guards along the back keep the case raised just a little bit off flat surfaces to avoid extra scratches. The angular design helps glance impacts, but also looks extra-sharp.

See at iMore Store

Your favorite?

There are a lot of iPhone 6 and iPhone 6s cases out there, and paring them down to the five best is a tough call. For example, our own Peter Cohen digs the iGlaze cases by Moshi and the NuGard KX, while Jared DiPane is a fan of the Incase SYSTM.

Shout out in the comments and let us know which one you pick or, if you prefer something else, which iPhone 6/6s case you're using and loving right now!