Planning to do a recap on my 690's . While searching , I saw a 1.5uf 1000vdc mundorf m-cap for $103.54, 1.5uf M-cap supreme silver/oil 1000vdc for $57.00 and a 1.5uf 600vdc m-cap for $17.00. Will the $17 cap work or should I get the more expensive ones. Thanks