I'm a pretty big rider and I've been pushing the Sultan quite a bit lately, not quite to Aqua levels, but at 240#s w/out gear I might as well be.
I've found it to be capable of fully replacing my 26er Tracer VP which was a 6'' front and 5.5'' rear (TALAS/CCDB). The Sultan is an XL with 20mm Thru Reba with a low volume can RP23, which has been a marked improvement over the standard but it's not a CCDB.
The bike isn't quite like my Delirium T where it can save you if you make a mistake, ala forgiving like a saint, but it is forgiving enough to try a new drop/roller/tough line. Ultimately though I'd like a 69*ish HTA, a couple more mm in the BB height, and a degree or two slacker seat tube. Would I ride that Sultan on the same lines as my DT? I'd try the more digestible lines at least once.
At the end of the day, I feel like my wheelset is the weak point in pushing the bike so I may get some Gordo's laced up 36h F/R instead of my current Flows 36F/32R (whack).