Matt, FlameDuck didn't say that BMX's built-in collision detection system would handle "thousands of objects"--quite the opposite. He said "under 1000 objects" (in bold, no less) and while I haven't tested his assertion, I'm inclined to believe it is accurate. Assuming you're using decent algorithms, under 1000 seems pretty reasonable.
If you're looking for a simple system, then I strongly recommend JazzieB's earlier recommendation of using a bounding box/pixel perfect combination system.
Your typical PII system is going to be 6-8 years old at this point--beyond ancient. While there are still some alive and kicking out there, it's going to be a pretty small percentage of total systems available, and those that do still run will be running on hardware that is well past the typical MTBF for consumer-grade stuff. You may want to consider setting your base expectations a little higher, for your own sake...
If you're looking for a simple system, then I strongly recommend JazzieB's earlier recommendation of using a bounding box/pixel perfect combination system.
Your typical PII system is going to be 6-8 years old at this point--beyond ancient. While there are still some alive and kicking out there, it's going to be a pretty small percentage of total systems available, and those that do still run will be running on hardware that is well past the typical MTBF for consumer-grade stuff. You may want to consider setting your base expectations a little higher, for your own sake...