Printers with WiFi capability are becoming more and more common these days. The advantages of a wireless printer are fairly obvious: the printer can be placed anywhere in range of the wireless signal and a power outlet, anyone on your wireless network can print to it and multiple computers can share the same printer.
Here are my personal top 3 Wireless Printers I recommend you check out:
1) Epson WorkForce 600 Wireless All-in-One Printer. As well as being able to print documents this device can also copy, scan and fax documents and print photos. It is a laser printer which I always prefer over inkjet because they have lower ink costs, they print faster and more quietly than inkjets although sometimes the upfront cost can be a little higher. It can print up to 27 pages per minute (black). This is comparatively fast for a wireless printer. It also has a built in Ethernet port if you do not have a wireless network. It is available on amazon for $129.99
2) Brother HL-2170W Laser Printer. This one is cheaper on Amazon, available for just $99.98. It's 23 pages per minute is slightly slower than the Epson but is still solid. It also has an Ethernet port as well as wireless capability. On the downside it does not have the faxing and scanning capability but is cheaper than the Epson so if you don't need this functionality it is a good deal.
3) Lexmark X4650 Wireless All-In-One Printer. This one is the cheapest on Amazon for just $79.99. It prints up to 25 black pages per minute which is faster than the Brother but still not as fast as the Epson. It has great 1-touch copy and scan features with no computer required. It is exclusively wireless though, with no Ethernet port for your network cable if you don't have a wireless network. It can also print photos directly from camera memory cards and USB flash drives. All these great features plus the cheapest price makes the Lexmark X4650 Wireless All-In-One Printer my choice as best printer.
All three are great printers with varying functionality so make sure to pick the best one to fit your specific needs.