You’re intelligent enough to know that carrying around a cell phone and a PDA is inefficient. Lighten your load by picking up an all-in-one device. Whether you use it as an organizer, an e-mail device, a cell phone, or all of the above, getting a smartphone is a smart move. Here are our top five picks for these phone-PDA hybrids; we’ve picked one from each major carrier, as well as one unlocked smartphone. This list will be updated regularly, so sign up for our Mobile Weekly newsletter.

1. Apple iPhone 4S

The iPhone 4S isn’t the king of cell phones, but it’s part of the royal family nonetheless. Even without 4G and a giant screen, this phone’s smart(ass) voice assistant, Siri, the benefits of iOS 5, and its spectacular camera make it a top choice for anyone ready to upgrade. Price: $399.99

2. HTC Sensation 4G (T-Mobile)

Its excellent design and user experience, coupled with its solid performance, make the HTC Sensation 4G one of the best Android phones yet and a top pick for T-Mobile customers. Price: $199.99 – $573.86

3. Motorola Droid Bionic (Verizon Wireless)

The Motorola Droid Bionic is everything you want from a high-end smartphone. It’s sleek, fast, and powerful, with features that will please both consumers and business users–if you’re willing to pay the high price. Price: $299.99

4. Motorola Photon 4G (Sprint)

With a dual-core Nvidia Tegra 2 processor, 4G speeds, enterprise-level security, and world phone credentials, the Motorola Photon 4G is a top-notch Android phone for Sprint customers. Price: $199.99

5. Samsung Galaxy S II (AT&T)

With its dual-core processor, vibrant display, and great performance, the sleek and powerful Samsung Galaxy S II rises as AT&T’s top Android smartphone. Price: $199.99