My box came with a Plantronics Calisto Bluetooth headset [actual model may vary it says on the box - see the photos above]. So whats it like. Well it can clip over any ear [ear-loop bit folds round, i.e. it's reversable for either ear]. The headhone bit pokes into the ear, and via a little rubber extended tubey bit it sort of locks into the ear hole and ear lobe. It's a bit uncomfortable and can take a bit of getting used to, but it works/holds on well and looks cool in a Dr Who Cyberman sort of way. It's all wireless so the headphone bit needs recharging every 8 hours via a USB lead and micro-plug into the headphones, which is a bit of a pain. The power plug clips in firmly and there's a cute red LED saying charging. Although the unit can fit on the ear with the lead in place it's not usable like that - so a flat battery stops you dead until the units recharged [so ironically a spare backup wired headphone set would be useful]. Theres a power on/off button on the headset that doubles as a volume control. The classy looking silver-themed headset comes with a pre-paired matching [large] USB bluetooth transmitter, and the off/on button also functions as the 'connect' control. Hold the button for more than 4 secs and the unit powers off or on instead. The Plantronics are 'noise cancelling' wireless headphone units, although even with the cheaper 'wired' Dragon headphones people can talk to you without upsetting speech/text conversion [you just can't reply, unless you mouse click the green mike on/off desktop/on-screen button].
Is the Plantronics on-ear single headphone/microphone worth the extra money over the cheaper Dragon wired version? Well if you like the 'Cyberman' cool wireless look then yes, but I did find it a tad more uncomfortable to wear than clip over the head wired versions [which aren't exactly design icons, and some find them much too tight] - however I've now got used to it and find it more confortable than the wired version [as the Dragion 10 wired version clamps hard on the head]. The wireless Plantronics look great though [all silver metalised plastic], and once you get used to it works well - you can setup Dragon to take mike input from both wired and wireless [different 'users'].
The basic wired version on the cheaper set is a single ear cup and microphone with a clip over head bit that pulls it into place [and is also 'reversable ear wise]. The cheaper wired unit's all black and plasticy but it works well enough and is very comfortable - not sure if it will last years of use though, but it might if you are careful and keep the kids away [and can find a replacement foam ear pad as that will wear out first]. There are alternatives like the decent Creative's [stereo headphone + mono mike] Digital Wireless Gaming Headset HS-1200, cost about £50, but I don't know if it works well with Dragon NS 10 [probably does]. However the Creative HS-1200 headset also needs a recharging cycle, unlike a wired set. My son  initailly rejected this Plantronics wireless headset and was sticking to the Dragon cheaper wired version as it's more comfortable - but having got used to his wireless PS3 headset he's gone back to the Dargon Plantronics wirless set, which I was using happily though [pehaps my son now has bigger ears?] - and sadly the wirless set makes you feel more 'cool' as well.
I am surpised how well Dragon Naturally Preferred 10 works for voice text conversion. To transfer a passage from say a book, just read it out and in Word it appears, normally with just a few corrections per 100 or so words. Correction is far easier with the mouse/keyboard though, if you can use it easily. Dragon actually seems rather better than text recognition via the scanner, i.e. faster as there's fewer corrections, with a paperbook book that can't be scanned easily down the spine. Give a scanner a clean A4 sheet of high quality text and simple photos though, and Nuance's Omnipage 17 can whizz though the OCR text conversion of an entire page in about a minute.