Proud new owner of a 97 ProStar here.
I'll be the first to admit that I know almost nothing about audio, so I've been reading as much as I can.
It seems the best place to start is with speakers and then work backwards to power them.
There's already a decent set up with Polk separates around the interior, so I'm looking at the tower. I've been considering a DIY project similar to this:
http://www.wakeworld.com/MB/Discus/messages/65921/241023.html I can't even find the Crossfire horn they used in the actual project, but I like the schematic at the bottom of the post. Eminence speakers are pretty affordable, so I'm thinking about this:
4 8" Eminence Beta-8A's and 2 Eminence PSD2002/LT-250's in a similar enclosure.
I would skip the down-facing speakers in the enclosure that was pictured. Thoughts on this?
BTW, if someone has pics of that project completed, I'd love to see them!