Definitely none of those. Moar platez, is the first thing I would consider. and/or an upgraded barbell / rack / bench, depending how good those things were to begin with.
A nice pair of spinlock DBs, perhaps. Gah, so many other things, actually...
^ The prowler idea is nice, too.
41yo, 6'2", ~93kg
best gym lifts: sq 160kg / bp 115kg / dl 190kg /
c&p 80kg / dips +50kg / chins +31.25kg
my training log