I would go with the ATB and get rid of de 002R, buy the M-Audio Profire 2626 with Pro Tools M-Powered, and then buy ATA plug-in from Mellowmuse and your problems with Hardware latency are gonne.
The 2626 has much better i/o possibilities than any 002 or 003, specially because it has ADAT S/Mux, meaning that you can start running external converters at higher sampler rates than 48K. You can also use the A/D conversion of the 2626 as standalone this way bypassing the pres of the 2626 if you don't like them. thumbsup
Do a search on the 2626...