Suggestion used tube amp between $1,500-2,000

Thank you everyone for helpful suggestions.  LS7 I bought it used and it is on the way to me but if it is not good then I might try it for a week and will put it on eBay.  And will look for tube integrated amp.  

I am using my old Acurus 200x3 amp that been on the shelf collecting dust right now.  And will replace my ADCOM preamp with the AR LS7 that will be here on Tuesday?  I was thinking to keep my speaker for a year and if you guys think that I should get rid of LS7 and then purchase integrated amp to make better sound, I really like Cary SLI-80 and that might be the one I am going to get.  Suggestion please.  

Thank you and now you makes me thinking again between Audio Research VS-55 with LS-7(sure will change to better preamp when I have more money) and Carry SLI-80!!!!!. 

Any other suggestion between this two options?

Thank you.