The vinyl sound is enjoyable at present but every once in a while there is that specific cut that you would just like to boost a little bit and I don't have that option.Which prompts a further thought. Records are cut at different levels. If you sense that those specific recordings are cut at lower than average levels perhaps a gain increase (via a different cartridge, or tube rolling, or some other means) would help, without changing to a more powerful amp.
Contrasted with that, though, would be the situation where you want to increase the volume setting due to the recording having very wide dynamic range. An example being well recorded symphony orchestra, where the average level may be fairly low, but brief orchestral peaks very high. If that is the type of recording you find yourself wanting to turn up higher, more power may be called for, to prevent clipping on the peaks.
Good luck!
-- Al