The G-Monster eSATA V2 is available in 32, 64 and 128GB capacities. Not too long ago the TweakTown labs were a buzz about the first 64GB USB drives being delivered, but that buzz was quickly washed away when we realized that transferring 60+ GB of data at 25 MB/s was really a drag. The G-Monster eSATA V2 still has a USB port and matches the fastest USB thumb drives when an eSATA port is not available, but once you kick it into high gear with eSATA the transfer speeds clime to 170MB/s read and 100MB/s write.
DVNation keeps the 64 and 128GB drives in stock and they are available now for 249 and 449 USD. The numbers might seem quite high, but Newegg shows the lowest priced 64GB USB drive as the Corsair Flash Voyager and it has a 169 Dollars price point. At 128GB the total cost becomes even closer, Newegg has the Corsair Flash Voyager GT in 128GB and it has a price tag of 399 USD. When it really comes down to it you are not paying a lot more for 5x the read speed increase and 4x the write speed increase.