tclune
Senior Member
I agree with the people who recommend the D5100 for you, but would suggest that the Tamron 28-75 f/2.8 would make a better portrait lens than the Nikon 18-105. The Tamron unit has the advantage of being much brighter (goes up to a larger aperture) than the 18-105, which allows you to more easily blur the background of a portrait and will let you take more photos without using flash.
If you can afford it (and you can if you could have purchased the D7000), you should also get a flash unit. If it were me, I would opt for a third-party iTTL flash unit, but just about any flash unit will do. The most important things are that it support at least the on-camera part of the iTTL (the D5100 doesn't do the off-camera flash support anyway) and that the unit swivels and tilts to support bounce flash (tilt for landscape orientation bounce, swivel for portrait orientation bounce or angled bounce off a side wall). With that equipment, you can get well-lit indoor portraits without needing to learn a lot about lighting.
If you can afford it (and you can if you could have purchased the D7000), you should also get a flash unit. If it were me, I would opt for a third-party iTTL flash unit, but just about any flash unit will do. The most important things are that it support at least the on-camera part of the iTTL (the D5100 doesn't do the off-camera flash support anyway) and that the unit swivels and tilts to support bounce flash (tilt for landscape orientation bounce, swivel for portrait orientation bounce or angled bounce off a side wall). With that equipment, you can get well-lit indoor portraits without needing to learn a lot about lighting.