What type of device will you be listening to with your Form 2s? I ask because they could benefit from more power than an iPod can offer.
If you are an Earset 3i fan, beware, the sound will be markedly different. I have both A8s and Form 2s and I hugely prefer the A8s. The A8s are much brighter (for the better).
Overall, they aren't very practical really. Compared to the A8s, they are less comfortable, sound worse and are fragile.
If you are a collector, go for it. All of this aside, I still take my Form 2s out a couple times a week and enjoy them! They just aren't a serious choice these days, that's all.
EDIT: I realize that this wasn't very helpful either!
Your dealer should have one out for demo that you can listen to for yourself 