Re: which modem best??
Doesn't really matter what kind of modem you use. Try using the newer one. See if either of them support V.92, over V.90. The V.92 modems offer a slight peformance boost, and some other features over the V.90 modems.
Rig -- Emachines T5026, 3.06ghz P4, 300W Bestec PSU, 160 sata hd, 512mb dual channel 3200 ram @ 3-3-5-8, ATI Radeon 9250 pci, dual layer 16x dvd+/-rw.