HP has outed two new and attractive all-in-one desktop PCs in the TouchSmart 310 and Omni 100. The TouchSmart 310 features a 20-inch 1600 x 900 multitouch display, a 2.8GHz AMD Athlon II 240e dual-core processor, ATI Radeon HD 4270 integrated graphics, 4GB DDR3 RAM, a 1TB hard drive, webcam, DVD burner, TV tuner, a 6-in-1 card reader, Gigabit Ethernet, WiFi, Bluetooth, two built-in speakers and Windows 7 is running the show.

The Omni 100 has a 20-inch 1600 x 900 non-touchscreen display, a 1.8GHz AMD Athlon II 260u dual-core processor, ATI Radeon HD 4270 integrated graphics, 3GB DDR3 RAM, a 500GB hard drive, a webcam, DVD burner, a 6-in-1 card reader, WiFi, two built-in speakers and Windows 7 as the OS.

HP has its sights set on offering up some new computers to desktop PC business users. This line is called the HP Compaq dc7900 and you’ll find starting prices set around $600.

HP’s new Compaq dc7900 line will be available in ultra-slim desktop, small form factor or convertible minitower models. The company hasn’t yet unveiled a lot of technical details, but we do know these models will be Energy Star 4.0 qualified as well as running something new called the HP Firefox Virtual Browser. This is a real-time Web surfing environment which “corrals malicious content from a user’s Internet interactions and removes unwanted programs with a single click.” The dc7900 is apparently the first HP PC to have this offering.

Lenovo recently introduced its first consumer desktop PC outside of China. It is called the Lenovo IdeaCentre K210 and pricing starts at around $380 post rebate, depending upon configuration.

The Lenovo IdeaCentre K210, which doesn’t ship with a monitor, is powered by an Intel Core 2 Quad processor and Intel GMA 3100 integrated graphics. It also offers the option of a Blu-ray/HD-DVD combo drive and 5.1 surround sound support.

Gateway recently unveiled some new desktop PCs – some of which are new models and the rest of which are revamps of existing PC line ups. These new computers are mostly available now, with prices ranging from around $550 to $3,500.

Gateway specifically updated or added new FX, GT and DX Series models. The one pictured above, for example, is the FX7026. All of these computers offer either Intel or AMD processors and at least one available at retail still has Windows XP. For more details, check out the full press release after the jump.

HP recently introduced a new business-focused Compaq desktop PC which is reportedly energy efficient. It is known as the HP Compaq dc5850 Business Desktop PC and you’ll find it with a starting price of around $600.

The HP Compaq dc5850 Business Desktop PC, available now, makes use of AMD Business Class processors, including the AMD Phenom processor. You’ll also find integrated ATI Radeon 3100 graphics with support for DirectX 10 technology, standard support for dual monitors and standard support for RAID technology with data mirroring.

Alienware is doing a major update to its Area-51 7500 flagship system and relaunching it as the Area-51 desktop. The starting price on this monster of a gaming PC is around $2,100.

The Alienware Area-51 PC new sports the NVIDIA nForce 790i Ultra SLI-based motherboard as well as an NVIDIA GeForce 9800 GX2 dual GPU single graphics card, according to Alienware. There is also support for DDR3 memory up to 2GHz, compatibility with 1600MHz FSB Intel CPUs and higher BIOS overclocking.