hmmm... depends on what you want it for.
I've got an NR70V+128MB card, but at the moment I'm suffering from the lack of Bluetooth (so if you can get a European NX73V go for it !)
That said, at half the price, the NR70V is a good device, has lasted me over a year now despite some abuse. I use it every day (with Iambic Agendus, PalmReader and the MP3 player) and would be lost without it.
Considering a UX50 at the moment (only because I can't get an NX80 with Bluetooth) but... at the current asking price I ain't going to switch !
Think about what you want to do and what you want to do in a few months, then make your decision.
I am using a NR70V now and I wish I have T3. The main reasons are memory and speed. I have a lot of appliactions and data and 16MB falls far short to meet my need. I am also using mapopolis and with newer machine it is much more usable.
Go with what you need and what will make you happy in using it. If you buy something cheaper but then yearning for upgrade 6 months from now then the cheaper one is not worth it. Remember each upgrade will consume quite a bit of time so factor that into your cost equation.