I don't think you could get a 6.5 in there, just not enough room. I just got back from a 1200 mile trip and listen to my music all the way with a full faced helm running 90 mph at times. All you need is a good head unit and decent 5.25 speakers you wont be disappointed.
I'm running a Kenwood head unit and four 5.25 Kickers the system sounds great.
Captain Spalding's Fried chicken and gasoline. * EXIT 13 OFF ROUT 1 at RUGGSVILLE*
2004 TC, 05 Vegas 8Ball, 09 Yamaha FZ6R
Lake Havasu City AZ.