If you really need the maximum buffer size for plugins you should record in the highest possible samplerate for your project. As the buffer size remains the same amount of samples, the actual time it consumes becomes less significant with a bigger resolution, i.e. 88,2 kHz. But usually an amp sim shouldn't be that resource hogging, that you would need to work with maximum buffer size in your playback engine.
Besides having the playback monitoring with too much delay, you won't be able to play along and it will mess up your timing.