Unless you work with SMT components a lot, having fancy tools isn't usually necessary. Weller makes solid general-purpose soldering stations (model WES51) which are a good deal for DIY level stuff.
For reworking SMT components, I prefer metcal irons. They are relatively expensive but they last practically forever and perform very well. You can often find good deals on ebay.
For hot air, I wouldn't spend more than $150. The market is flooded with cheap units which are all built with the same parts, and any of them work fine for producing hot air.
However I would definitely avoid all 2-in-1 stations, since the soldering irons that come with them are universally garbage.