If your two primary goals are pure explosive strength and size/weight then you must lift, power lifting being ideal. If I were you I would focus on these exercises: Bench press, strict overhead press, dead lift, back squat, weighted dips and weighted pull ups. In terms of reps, I would keep them fairly low. I just finished a similar strength cycle and put on a good 15-20 pounds of muscle. This is how I would suggest breaking it down:
Plan on lifting each of these exercises approximately once per week. Start by establishing a 1 rep max on each exercise. The next time you lift a particular exercise perform 5 sets of 7 reps @ 82.5% of your 1 rep max, the next time you lift that same exercise perform 5 sets of 5 reps @ 87.5% of your 1 rep max, the next time you lift that same exercise perform 5 sets of 3 reps @ 92.5% of your 1 rep max and the next time you lift that same exercise find a new one rep max. Do this with each lift (for weighted dips and pull ups a simple 5 sets of 5 might work better, up to you). Continue this cycle for about 12 weeks and then take 2-3 weeks off, rinse and repeat. Sorry if this is slightly confusing, but I have personally had success with this method and have seen others have even more success than myself. hope this helps somewhat