Looking over multiple threads, especially this one,
http://www.thirdgen.org/techboard/tbi/336750-tbi-tpi-heads-headflow.html , and the threads linked within, a ported 193 head seems to be just fine, especially on low RPM motors. Flow data on a stock vs ported 193 creates a great torque head. Obviously they hit their ceiling above 4500RPM, but thats fine for my application... a daily driver/family mobile with a little more push. Also, once you consider I can get a set of 193 heads on the cheap and do the porting myself, the power vs cost factor is very nice. I figure, at most, I'll have $450-$500 in the heads if I go ahead and replace the valves/springs/retainers/rockers. As I said earlier, the valves themselves might stay stock, but a set of undercut valves should get me a little bit more power, so we'll see how the budget shakes out.
At the end of the day, I figure I'll have a much better engine for about $1500, since I'll be doing the work myself. That's really not so bad, especially since I'll know whats in it and it wont have over 200,000 miles on it like the current engine has.