HI:
My recommendation would depend on how much $$ you want to spend. I have owned the LS2B, LS2B mkII and the LS25 MKI. The LS25 MKI is a very good performer, but will be quite a bit more expensive than the LS2B. I have tried the LS15 in my system and it is a fine linestage. I have not used the LS17, but it has a very good reputation. The LS25 is the best of the lot that I listed above.
My recommendation would depend on how much $$ you want to spend. I have owned the LS2B, LS2B mkII and the LS25 MKI. The LS25 MKI is a very good performer, but will be quite a bit more expensive than the LS2B. I have tried the LS15 in my system and it is a fine linestage. I have not used the LS17, but it has a very good reputation. The LS25 is the best of the lot that I listed above.