Heh heh heh...
Firstly, welcome Rob!
The IMEX/Kangnam kit is an ok representation of the prototype Longbow Apache. If you want to build the prototype, you'll just have to deal with the fit issues, which are pretty easily corrected. However, if you want to build a current machine, there are a LOT of mods needed to make it accurate. I've spent a few months on mine and most of that time has been in correcting the flaws.
The most glaring inaccuracies are the aft ends of the avionics bays where the ECU vents are. On the prototype, the bays just tapered down aerodynamically, but the production machines have a much more rectangular end on both bays. If you look at Albymoore's 1/48th Longbow photos, you can clearly see them (the Hasegawa kit got them right).
Also, the low-airspeed sensor booms extending from each engine nacelle are omitted in the kit. Not too hard to scratchbuild, but a kit part would have been nice! The cockpit is still the AH-64A cockpit, so either they got lazy and didn't research the new cockpit configuration or they didn't have access to a D model Apache.
Finally, and most frustrating, is the main gear assembly. The instructions are really poor and don't show you exactly how they should be attached. If you follow what seems to be correct, the gear are on the complete wrong angle and make the bird stand up about 2" taller than it should. Correcting that problem entails trimming the shock absorbers on the struts, which is a royal pain in the @$$.
Oh, also, the detail on the radome sucks.
If you're willing to work with the inaccuracies and add detail yourself, you can get a nice kit. I just wonder if Hasegawa will read my mind and scale their 48th kit up to 35th....
Hope that helps!