integrated amp with phone for graham ls6 under $4000 new

thank you for all the advice. i’m gonna go listen to both the exposure 2510 and 3510. based on lots of reviews (and price), leaning towards the 2510 with mm phono and then when ready to move to mc, buying an external mc phone stage at that point. anyone compare the 2510 and 3510? seems some people prefer the 2510 and i’m wondering if the extra $1500 for the 3510 with mm phono is that big a difference to justify the price. would love the moonriver but out of my price point 

any speaker wire recommendations for exposure 2510 to ls6s? the ones i’ve seen are 5 meters which seems quite long

What do you mean “the ones I’ve seen?”  How long do you need?  Personally, I would just start with Belden 12 from Blue Jeans cables and listen for a few months until everything breaks in. Then you can try something else to see if you like it better. 

i meant when looking at wires for sale, most say 3.5mm or 5mm. i wasn’t sure if there was a danger of damaging amp or speaker if using the wrong type or wrong length, is there? currently i have about 6 feet each from my old amp to each speaker  of this cheap wire “wire path bulk wire by snap pan speaker14awg 2c 105 strand oxygen free copper”. would that work for the time being or think i should get the blue jeans?

The measurements you list are in “mm” not meters, so I would say they are in reference to the size of the binding post a spade lug fits, thus does the speaker binding post measure 3.5 or 5mm in diameter.  Wrong size spade lugs = a big problem.