Looking to buy a keyboard to play for kumzitzes as a job in camps and schools. Need something with good sound quality very easy changing of voices, transposing, etc. Not looking to pay more than $1000 if I don't have to but would go up to $2000 if its worth the money (I don't need all the extra features). Would prefer if its not too heavy. Also do I need speakers also and if yes, which do you recommend I buy? I don't mind buying second hand but I need a reliable place to buy from. Please advise. Thank you!