I have a GP 1006NT.  Only used it one year so far but it is definitely a step up from my previous one.  Has small grain box (I put clover out with it) and the native grass seeder box too.  Next year I am thinking about putting oats in the normal box, rye grass in the native box and clover in the small seed box.  I just need to figure out if I can regulate the rye grass down low enough and if the placement will be too deep.  I used it to plant oats and rye grass last year, but not at the same time.  Depth adjustment is very quick with the GP.  Very happy with mine.  I found a small seed tender to fill it with.  Saves the back.