Default Phone upgrade suggestion

Hello everybody!

I have a chance to replace my (not so old) HTC Hero, which just recently updated to 2.1 officially, with a HTC Desire for about 345 € (I'm from Italy).

Would you suggest the upgrade having the phone or having compared it to the Nexus or the Galaxy S?

The Nexus is quite hard to find here and the galaxy costs 450 + €.

I love custom roms and I'd really want a 2.2 rom but I don't know how well do the Desire's coocked 2.2 ROMs perform compared to the original Nexus 2.2. If it's worth a shot I'd buy it, otherwise I'd just wait for prices to go down or better phones to be available (used is not a problem) at 350 € give or take.

Any suggestion?