Try-all 3d stem is a good call, the one I tried on a proto onza stock ( 1080, +50 ) felt really damned good.
Tyres wise... Kenda small block eight or try-all stiky up front. Der kaiser rear if you want ultimate puncture protection and can afford it, minion if your budgets a tad lower, and kenda nevegal folding 2.5 stick-e if you ride smooth