I think that the perfect schedule might be one that doesn't necessarily match up to the days in a week. Something like:
Day1. Lower body day
Day2. Upper body day
Day3. Active Rest (just to get the blood pumping to your muscles for recovery)
Day1. Quad dominant (squats)
Day2. Upper body
Day3. Posterior chain (deads and Olys)
Day4. Upper body and core
Day5. Active rest
The problem with those is that my lifting schedule can't rotate through the week like that because of my work and family schedule. I can't guarentee lifting time on any particular day, so I would end up missing days and going too long between certain excercises. I used to do something like the second one, but I'd have to skip a day or two in there, and I'd often end up squatting only once every 7 or 8 days.
But if you can get gym time on any particular day you want it, I'd look at freeing yourself from the weekly calendar, because there may be much better splits out there.
Maybe you could even experiment with different times of the day. You could lift on the morning of the first day, the night of the second day, the morning of the fourth day, etc. This would essentially give you 1.5 days, 36 hours, between each session. That might give you just enough rest to maybe hit the same muscle group similarly in two consecutive lifting sessions that are 36 hours apart, instead of just 24.
I don't know if that would be too much or not, but maybe it could be split something like the first session could be power or max based, then 36 hours later, you do more of a hypertrophy session. Then you rotate on to another muscle group for two sessions, giving the first muscle group several days to recover from its doubleshot of stimulus. Something like this:
Day1Morn: Big, Max Squat day
Day2Eve: Hypertrophy quads day (squats for like 4 sets of 10, wall squats, single leg squats.
Day4Morn: Big Bench and Incline day
day5Eve: Shoulders, flys, tris, etc.
Day7Morn: Big Posterior day (Olys, Deads)
Day8Eve: Posterior hypertrophy (good mornings, lunges, Glute Ham Raises, etc.)
Day10Morn: Back (maybe only a day of back because deads and Olys work this well)
...and so on.
Just some thoughts. I wish I could try them myself someday.