Hey Jeremy, thanks for reaching out! Glad you like the boots! The Intuition Pro Tour
would definitely suck up the most volume. It also would offer some extra height and stiffness (most notably in the tongue). That being said, there'd be a direct tradeoff between the walking performance and descending "upgrade" you'd experience. Maybe a more appropriate liner choice though would be the Palau Powertrack 10
liner. It's designed around slightly heavier boots (think Scarpa Maestrale, Sportiva Spectre, etc) but it walks well enough that it's definitely a suitable replacement for a lighter boot like this, particularly if you are experiencing volume issues.