It pains me to say this but: Crossfit.
For all around general conditioning its hard to beat.
Hell go back to T-Nation authors evaluations, they can point out the cult aspect, but when doing 3 rounds of say cleans, burpees, and pullups as an example, by round 3 only your will and stamina will save you. The weight isnt so high you risk injury, but it will feel like 1,000 lbs if you are pushing yourself.
Now for the realistic part.
You would need to find a Cross fit place that has worked with basketball players before as there are a lot of the O lifts that can be worked into your workouts that would focus on explosive power. So a gym could customize some of the lifts and exercises more geared for what you need while not overtraining you.
Look at what Waterbury is preaching these days for his MMA guys, a crossfit like conditioning program.
If you want to get HHHUUGGEEEEE, look at any of the great articles on the site, but if you are trying to get explosive power and the ability to work through discomfort while performing then give it a try.
People can point out all its faults, but having given it a try (unlike most folks who just complain never having given it a month or more) I can say from my point of view it has helped my stamina tremendously. Taking Krav Maga and BJJ, I am always amazed at the folks who are faster/stronger than me, but I end up outlasting them, and as the saying goes its not the size of the dog in the fight but the size of the fight in the dog.
The fun part has been working in Thibadeau's (sp?) active recovery and other great ideas to work areas I still need help with.
*I made fun of my wife for doing Crossfit, then 'tried' a class and nearly passed out only half way through the workout. I did NOT have the stamina to keep going!!!! There is a reason firefighters, cops, and military like xfit. Being able to bench press a small car wont help you jumping over a wall chasing someone, or doing a lay up.