Lpc2000

Hi all, 

I'm currently trying to find good and not too expensive tools for
programming and debugging the LPC2148. I intend to use gcc as
compiler. Can anyone describe what advantages Rowley Crossworks has
over Eclipse+gcc+gdb? 

In addition, what is the main difference between the different lowcost
(sub-150$) JTAG adapters? I understand that, with a Wiggler compatible
product, the program is ran and debugged from RAM. This limits code
size by the amount of RAM available. Are there low cost JTAG adapters
that allow code to be executed and debugged in Flash? 

What do I gain if I use a Rowley Crossconnect or an Amontec debugger
in stead of a Wiggler clone (for example the Olimex tool)? 

Thank you for all tips !