hi guys this is my first post on here, im adam and im new to DSLR's and my first opinion is i love them!!! i have a nikon d3100 with a 18-55 kit lens and love it so far, already want the 55-200m lens! haha

my question is about getting some of my photo's printed out, just wandering where is good?? i have some nice photo's i want to print and am worried about sizing etc? i obviously want it to look good and just like it does on the screen but am worried it wont, and worried at what size i can go up too before i lose quality, can anyone speak from experience or give me some tips or point me in the right direction?

thank you all.
adam