Buzz around Apple's next-generation iPhones has been building to a fevered pitch: here's a roundup of the most plausible ones.

Release Date and Price

The biggest question on everybody's mind has to be: "when can I buy one?" Apple typically builds hype for its devices by showing them off at some reveal event, but the Cupertino tech giant still hasn't sent out the invites. According to Re/code, however, Apple will apparently reveal the iPhone 6 on Sept. 9. If the company sticks to its typical release schedule this should mean that consumers can pick up the new iPhones in stores one week later, on Sept. 16.

Apple hasn't commented on the date and there have also been several rumors swirling around that production issues could delay the launch of the larger 5.5-inch model. Apple has already put in a gargantuan order in anticipation of incredible sales figures, asking manufacturers to ship between 70 million and 80 million units.

"Production bottlenecks on 4.7-inch iPhone 6 center on the yield rate of in-cell touch panel and metal casing," KGI Securities analyst Ming-Chi Kuo wrote in a report. "As in-cell touch panel becomes larger in size, the edge of the panel may become insensitive to touch. Meanwhile, under new manufacturing process for the iPhone 6 metal casing, color unevenness is an issue."

Still, the money should be on Apple hitting its desired September release window.

As far as pricing goes, the 4.7-inch iPhone 6 is said to replace the iPhone 5s at its subsidized slots starting at $199 and the 5.5-inch iPhone 6 will be priced $50-$100 more.

Looks and Specs

The iPhone 6 will come in two variants: one with a 4.7-inch display and another with a 5.5-inch screen. The sizes are a significant leap from previous iPhones, which never had a display larger than 4 inches. Several leaked photos of iPhone parts indicate that Apple will most likely the overall design similar to the iPhone 5s, albeit with minor changes.

Underneath the hood should be the new 64-bit 20-nanometer 2GHz dual-core A8 ship and 1GB of RAM. Expect a fingerprint sensor and 13-megapixel camera on both models, but there could be some differences between the two sizes. Those who want a sapphire crystal display or 128GB of internal storage may have to pony up the cash for the 5.5-inch model.

The phone will also release with iOS 8 preloaded along with integration with several key new components like Apple's focus on Health.

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