You probably didn’t want another Hana suggestion but it seems nice with the waterfalls and all. You should probably consider stretching it out to 3-4 days or maybe even 4-5 and just take your time enjoying the scenery. Compariing it to Yosemite is tough since some of those hikes can be pretty nice – the one from White Wolf to Tuolomne (sp?) was a nice one though can pose some issues for those with knee problems. BTW, my friend and I did the Yosemite one and although she had some knee issues, she came through like a trooper and climbed the mountains like a billy goat! Whatever you do, have a great time in Maui!