This is a general thread on the subject posted as a link to the FAQ sticky for the amps forum. After review of old threads and merging several of them i decided it would be more useful to post a fresh one. To access the original merged threads click on this link. Just be aware that it can be somewhat repetitive and it contains some flame wars, some of which are from years ago. Hopefully most of the combatants have made amends since then. Please go ahead and post your preferences and insights in this thread.