Lpc2000

We've got a board: http://www.njqrp.org/hc908/index.html
with one of these Mot chips on it.  The board was designed
to allow a variety of CPUs to control the devices designed
to accept the daughtercard.

I'm looking into making an ARM version.  Can anyone suggest
an ARM uC with this minimum set of features:

32 KB FLASH  -- so, equiv to what a HC908 can do with 32KB of FLASH
1K RAM/
512 bytes EEPROM  -- we can add this externally in a serial EEPROM
51 general purpose I/O pins
8-channel 8-bit A/D Converters
two 16-bit timer ports * 4 PWM channels each
Programmable interrupt timer
UART
SPI

The PWM/timer stuff is probably negotiable as an ARM can probably 
fake it well enough.  Same goes for the SPI, if it really matters.
Heck, the A/D could go on an external chip, as well--if it really
helps.

I'm only familiar with the LPC210x family and I've not really
followed any of the newer ones.  Would one of them work here?

Other vendors?

AmQRP isn't a huge orginazation, so we're talking small quantities
of chips--25-100 at a shot.  If the proposed chip can't be had in
those quantities, then we might as well forget about it. :(  That
is made clear to us by the situation we're in WRT the Moto chip.
They're getting a little hard to come by. :(

From Microchip, I'm looking at the 18F6621 or maybe even a smaller
memory part.

I'd like to thank everyone in advance. :)

Cheers,
David n0ymv