I need a string quartet for 2 violin's,1 viola, and one cello.Does anyone have a good pice they reccommend.(not too hard,not too easy).

i'm doing david stone miniature quartet no.1 at the minute. it's lovely

Any of the early Haydn quartets are quite easy (except perhaps for a more adventurous 1st violin part)

Agree with the Haydn. Best advice I can give is to get your 1st violin to choose one that he can play. The chances are that the rest will be able to play their parts. Start with the minuets (The emperor quartet minuet is reasonable, but the 1st variation is virtuoso violin stuff and the last movement is very hard for the cello). Eine Klien Nactmusic seems reasonable as well. I wish I could say the same for the rest of Mozart. I once made the mistake of thinking that the Brahms individual parts looked easy, it was a non starter. Beethoven Op18 no4 is ok as well. If this is too high a first step then you could look in the shops for arrangements for quartets and try them.