hmmm, I dunno Jason. The 4 min pie is thing of beauty in it's own right. You may someday appreciate it much more than you do now. Not saying you don't, but you may find that after you have achieved your NP, that your first love was true all along. I'm not sure the LBE will do it either, but it will get you 1 step closer.
I think the closest anyone has gotten to NP in the LBE is right around a 2 min bake and that is really pushing it. The LBE will do 3-4 min pies without sweating it too much, but a sub 2 minute pie is tough. I don't know what constitutes "true" NP, but a lot of folks are baking around the 1-1.5m mark in their WFO. You may have to get a WFO to find that true NP and then realize it's ultimately not your favorite. Having said that though, you can make awesome 4-5 min pies in the WFO as well or do what I do and play around with both styles in one bake.
I still think that the LBE is a worthwhile project b/c it will teach you a lot about balancing heat with your dough. It is $ well spent IMO.