I've not tried Mundorf silver/oil, but I use silver/gold in phono stage & line stage components-- particularly in higher values where V-Caps become cost-prohibitive for me. The Silver/Gold are clean and neutral, and IME do not lack for bass as some have commented. Mundorf wrote to me that Silver/oil it tilted up in midrange and bass and that Silver/Gold is more faithful to the music "as recorded." Also, if the caps are to be used in a hot tube amp chassis, consider that the silver/gold are rated to a much higher temperature.
Whatever you decide, allow several hundred hours for the caps to relax and sound natural.
Whatever you decide, allow several hundred hours for the caps to relax and sound natural.