Let me throw in the Intronix Logicport. Hardware and nice software made in USA, good support. Samples up to 200 / 500 Mhz.
The only drawback: with its small 34x2K memory it is outdated, however it comes with an incredible hardware compression which helps a lot. Due to the sophisticated multi-stage trigger mechanism and the compression, the low memory is often not a problem. Though for extensive protocol analysis the memory is too small and you better look somewhere else.