Mike - I don't have ay experience w/ any of the units you listed but they all look like they would look fine for your needs considering the low power requirements of the incoming pre.
I did recently purchase a LPS from Swagman labs (also in HK) for my pre and was very impressed with the results versus the stock wall wart, The reason that I went w/ Swagman is that my unit had a very unusual AC voltage requirement, and Swagman will build any custom configuration to suit your needs.
No matter what LPS you choose, I would imagine that you will be happy with the upgrade.
Greg
I did recently purchase a LPS from Swagman labs (also in HK) for my pre and was very impressed with the results versus the stock wall wart, The reason that I went w/ Swagman is that my unit had a very unusual AC voltage requirement, and Swagman will build any custom configuration to suit your needs.
No matter what LPS you choose, I would imagine that you will be happy with the upgrade.
Greg