if you want an agressive spike thats got some more stiffness to it, then I'd say the nike milers are the way to go. not as light as the victories which utilize the same basic plate, (victories have a cut back plate)but definitely stiffer due to a 3/4 length plate that is used as oppossd to the forefoot only plate for the victories. also a bit more comfortable and imho i think they have better lockdown.
another good option (if you can find them) are the nike kennedy's, very agressive spike that features a full length platic outsole plate and definitely more along the stiff side. great for getting you onto your toes. one of the more aggressive spikes i have in mind (about the same as milers if not more)
if you are okay with a spike that isnt as bulky or even as stiff the victories are another great choice. they have great lockdown, feature the miler plate variant (cut back) and are very agressive as a spike. they may not be as stiff but they really get you onto your toes and are perfect for 1600/3200m.
another option is the nike lanangs, same shoe as the miler but with a different upper. only real difference is the upper doesnt offer as much lockdown but a lot of people think it is more comfortable and with a miler plate you cant go wrong with a combo like that.
in my opinion, the way to go would be the milers out of what I listed here. you can still find them on ebay, a little bit harder to find certain sizes but there are a couple of size 8's, 12's, 12.5's and 13 and 15 sizes there. my absolute favorite spike in terms of agression, comfort and durability. theyre also cheaper than most of the other spieks listed and have great range to them, in fact the mile and 2 mile are ideal events for them, and if you ever need a spike for an 800m race these are perfect for those.