The Tascam DR-03 is significantly smaller, has a SD slot, and 24 bit capability. I think it is also branded as the DR-08 and the Teac VR models are the same as this as well but I haven't used those.
Mics: Nak CM-300s, Nak CM-100s, CP-1s, CP-2s, AT-853s(Cards, Hypers, Omnis) CA-14s(Cards, Omnis)
Pres: CA STC-9200, CA-UBB
Recorders: Tascam DR-70D, DR-2D, Edirol R-09
ISO: 1 Teac ME-120, CP-3 Caps, AT-853 Subcard Caps