Haven't skied walls, but volkl has a reputation for really durable skis, and the waklls got really good reviews from a lot of mags and stuff. Line Invaders are really light, have a lot of pop and butter extremely well. However, they don't have a sintered base, which means it is not as hard and is alot slower. My brother's 06/07 invaders chipped all around edges of the topsheet down to the core, edges started to delam around tail on one, and bases have huge gouges and a few core shots after 1 season, so if you get thsoe they will probly get trashed pretty quick, but they are a ton cheaper. i'd say overall teh Walls would be better performance.