With today's modified malts there's no need to do a 90 minute boil, even with 100% pils grain bill. It could give you a deeper color but other than that I haven't noticed any difference. So I've stuck wiht 60 minute boils for the last few years, adding an ounce or 2 of carafa special for color. The exception being a Helles I brewed this spring and did a hockhurz decoction mash and 90 minute boil. That was a long day. Nice Helles though!
Simcoe Pils huh...interesting idea. What kind of hop schedule?
Bohemian Lager is a good choice. It's one of my favorite yeasts. I've used it with every german style lager I've brewed from pils to doppelbocks. My favorite for Pilsner is the Urquell yeast wy2001 but it's become difficult to get. I just made a starter for wy2206 bavarian lager yeast to brew a pilsner soon.