Wow, let's not get too carried away here...I think contigiousness (hm, does that really exist?) is more important. Look at how actual districts in RL looks. They're always contigious (except for when they're HEAVILY gerrymandered). And population doesn't have to be exactly equal number ov voters. As long as the differences aren't too big.
In real life, the Supreme Court has definitely held that districts being equal size is more important that geographical integrity. This is because "one person, one vote" is a constitutional guarantee, while geography
For instance, they struck down the original Pennsylvania map in 2002 for only slight differences in population, while upholding all of the recent political gerrymanders, like Maryland and Texas, no matter how wacky the Districts looked, as long as they had equal populations.
The SC has struck down gerrymanders that were racially motivated. But that is because not being discriminated against on the basis of race is a constitutional guarantee; pure georgraphy is awarded no such protection.
