I use a DFGT and it works well for me. Had it for over two years and it's still in fine shape, although I use it with socks or bare feet so I can compensate for its pedal units' weak springs (and to reduce wear on the unit from shoo-ed feet). A very good investment imo.
But... More generally, what you get is in large part dictated by the money you're willing to spend (and have to spend), and what you expect its ergonomics to provide. If you want a full sized wheel (literally), then a higher end unit is what you're looking for (for instance, there are after-market adapters for G25/27 series that allows attaching a full sized wheel instead of the stock wheel, similar option *probably exist for the Thrustmaster/etc units). If you require hydraulically damped pedals, neither the DFGT or G27 is gonna cut it... etc etc.
The DFGT costs about ~$130 (US) retail, give or take a lucky sale price. G27 around $250 (same sale luck involved if you want a lower price. $250 is retail). Thrustmaster and others range from prices similar to the DFGT upward well beyond the G27.
The stand is something you can purchase separately (and probably should) or build/adapt/repurpose yourself. My stand is an old Tektronix Oscilloscope stand, repurposed by removing the caster wheels and adding a piece of wood to the base for mounting the foot pedal unit and a shelf for mounting the wheel, but there are a ton of ideas for stands floating around out there (and in this forum) and a plethora or commercial units too (ebay, online stores, etc)
As far as cost... that can go for as little as a piece of your coffee table on up to the thousands. All depends on you and your wallet and DIY ability.