After a search and compare, I went with Hogtunes front speakers and 2 ch amp. Due to the cigarette lighter not being live from factory I ran the speakers only for a bit. It sounded better, but no help over 75 mph. After I got the amp working, it was better up to 80. Then I added the lowers kit, but still only 2 amp which uses the factory radio power for the fairing speakers and the amp for the lowers. Great sound at any sane speed with some ok bass (and I'm a bass player).
Just after I got it working HT came out with an improved bass system (figures). I talked to them and they said I might want to consider upgrading to the 4 ch amp. Long story short, I'm not changing my current setup, it is a vast improvement and I'll only upgrade if/when the current system fails.