Which Orange PAYG for £100?

Doonhamer

I have an old Orange PAYG phone with a B&W screen (Sony Ericsson T200) and the time has finally come to change it, which is a pity because it has been a great little phone, but the battery is starting to die.

I have looked at the various cash back deals on contracts which are attractive but have decided not to go down that road.

Instead I want to but a new PAYG phone for about £100. Either an Orange one, or one that I can unlock myself for free and use on Orange. So I'm after recommendations of good phones at this price.

I have seen the Orange SPV C550 for £110 in Comet and on this forum someone pointed out the Nokia 6230i from Argos for £100 on T-Mobile, which I believe is easily unlocked (but it is out of stock). I don't really like clam shells. I hardly ever use the phone so call/text costs are no real issue, but I do want something smallish, oh and I need triband.

Any suggestions would be very welcome.