i use canon, but if I were to recommend you a Nikon dslr, it'd be either D90 or D5100. They are both on the same price range. But I think D90 is a little bit older than D5100. If you think you'll be shooting some videos too, buy D5100 and you might be able to find it a bit cheaper than D90 (because D5100 is classified as beginners' camera whereas D90 is considered a prosumer). below is a link for a site that compares these two cameras. 

talking about lenses, it really depends on what you want to shoot. since you said it's your first time buying a dslr, get a decent walkaround lens like 18-105mm and a prime lens - 35mm or 50mm should do fine for now. you can and probably will add more lenses in the next 6 months or so. 

when buying a camera, buy from major retailers : amazon, adorama, bhphoto, cameta camera, nikon itself, etc. do not buy camera body and expensive lenses from ebay, it's risky. again, if I were you, i'd buy D5100. check prices on the four retailers i stated above, they usually have the best prices available.

http://snapsort.com/compare/Nikon-D5100-vs-Nikon_D90