Slide-under cupholders, FTW.
The "Jumbo" hold any size glass. Since I have a number of marathon runners in my games, it's not unusual to see mega-sized water-bottles that simply wouldn't fit in a smaller cupholder.
Jumbo cupholders are tall enough that they do an excellent job preventing beer bottles from being knocked over, though tipping is possible.
Slide unders never collect chips.
Slide unders can sit left, right, or center of the player as dictated by player preference. Player preference also reduces the possibility of accidental spills.
Octagons dictate a specific zone - from corner to corner - for each player. If a corner is jabbing you in the gut, you're doing it wrong.
Of my 3 tables (10 player oval, 8 player "oval", and 54" octagon), players that expressed a preference prefer the octagon.
However, I will concede that a 10 player oval allows for a little more expansion, and when hosting a tournament two 8-player octagons suck as you will have four at 1 table and five at the other just before the final table.