i think if you were ever to get another remap it'd be worth doing if you really changed anything major.
I'm sure you're probably more than happy with it as it is so maybe no point in fiddling with little things. If you ever wanted to really go to town i'd probably go for a more full on, custom 4-1 header and then do the 2.5-3inch exhuast to go with it. I really think header is so vital.
Having said that 191whp with the fuji and a crap 2.25 exhaust is pretty good as it is - and you never know with a custom 4-1 and a bigger exhaust that lovely flat, broad torque curve could suffer and ruin the feel of it.