I think it's good to mix things up every 6 weeks or so. ME and DE day routines are definitley top notch, but they can become "stale" after a while -in my opinion. I have had good results doing 6 week waves with ME and DE days, GVT, rest pause type training, and high frerquency training -benching 5 days a week, but you have to be careful with the intensity level or you will fry your CNS -speaking from experience here.
Mike Mahler has some good stuff on HFT as well as Pavel, t-nation has some good routines, also dragondoor,you just have to search a little bit to find them. The HFT system has produced good results for me and it gives my joints a break from all the ME and speed work that tends to break up my shoulders and elbows.
I think assistance work is where you can make or break your benching ability also, it's easy to do way too much of it and wind up killing your bench.
Just my $.02 bro