techfreak and sygeek are suggesting Optimus net whereas you and Sam are suggesting Optimus one.
So I need one more vote from someone to take a call.
You've got the opinions you needed. Never take them as the finaly buying decisions. Everyone has different preferences.
Try both of these phones at a retail store, if possible. If Optimus Net isn't available at the stores (and you'll be buying online), do the research yourself. Compare them, watch video reviews and decide the major factors you need in a phone and categorize the phones to why buy either of them over the other.
If you're still confused, post your conclusions here.
Edit: LOL. Ignore what I posted, not much difference between the phones to get mixed up with it. If it were me, I would go for Optimus Net just because of the processor. Tbh, you can buy any of the two phones, you won't regret it.
If you prefer build quality and design over a little speed compromise, Get Optimus One.
If you prefer more speed over a little compromise over build and design, Get Optimus Net.
If it's true that Optimus One can be overclocked to the extra 200Mhz, as some users are saying above, and you're fine with a little tweaking, definitely go for Optimus One.