i may get flamed for this but oh well. If you want the least aggressive timing then out of the two i would say EZ. But, going by your statement then i would suggest you look into the Diesel Dynamics TTPM (Edge EZ chassis with a little less timing). At least this is the gist I've got since watching the boards.
If I'm wrong then correct me guys.
If your trying to keep smoke down then go with the EZ/TTPM(very similar). The VA has a pretty aggressive low end.
If your worried about exhaust temps then all i can say is that these boxes are not bad to cause high exhaust temps even with DDII's and towing "heavy".
Of course I assume you have guages. Also exhaust is recommended.
Try to complete your sig we don't know if you have certain "required" items. Whether you have a 5sp, 6sp, or auto, etc...