It has occurred to me that perhaps because of the way digicams are marketed with quality being equated to a massive zoom range, people moving to DSLRs may be making poor lens selections.
Digicams NEED to have a good zoom range because you can't change the lens. One of the key features of a DSLR is that you can.
All zoom lenses are a compromise - the longer the range, the bigger the compromise. Those that range from extreme wide angle to telephoto are the most compromised of all - it is a very challenging design task to handle all the optical issues that arise from that design.
If quality is your primary concern (rather than convenience) I would recommend considering buying 2 shorter range zooms (say something between 24-50 and another 70-200/300). Obviously there are variations in cost and quality, but in general, you will get better and more consistent results for your money. Of course purists will argue that you really need a fixed focal length (prime) lens for optimum quality - and this is generally true - but the quality of the less extreme zooms has come on a lot, and new versions can challenge some older primes.
Of course buying 2 lenses will cost more than one 'all purpose' lens - but, if you continue in this hobby you will very soon get dissatisfied with the super-zoom and end up replacing it anyway. Remember, a good lens can last a lifetime.
Colin K. Work, Pixstel