which monitor for audio refinement int. amp?

i have a arc amp on the way which will paired witha rega planet 2000 for a system in my bedroom. i listen to mostly jazz of all genres and some rock, and i'm looking for a bookshelve speaker to suit my needs. i will be buying used with a budget of $700 but wanting to spend less than that.
i've done some research and have come up with some choices
JM Labs cobalt 806 & opal 607
Jean Marie Rey. twin mk ii or iii(shy on the base)
triangle titus or comete(kind of bright)
totem rokk
b&w CDM 1nt
spendor s3/5,s3/1
what do you guys think, any other suggestions.please help a newbie. thanks