Ipod Storage Upgrade

Question about ipods!?
So heres the thing, I have an ipod nano 2G first generation of storage. I already set up itunes and stuff. I been seriously considering upgrading to an ipod touch. If I touch, I can just plug it in, synchronization, and start downloading? or need a separate itunes ipod separately? This may sound silly but I only had an ipod this and I have no idea. thanks! Alex ~ thanks man! Exactly what I was looking for.
nope just plug it in, register and synchronization