#1
okay, so i have 3 chords, ii want to add a 4th, but i cant think of a good chord that will go with these three

C#Min-F#Min-BMaj
RIG

Marshall MG 50DFX
Fender Stratocaster
Epiphone Les Paul Standered
Dunlop Original Cry Baby
Yamaha APX5A
RP 350
#2
Try either G#m or E. Both sound nice and are in the key of C#m.

Amaj would also work -- but it doesn't really sound good as the final chord in your progression. If you want to change the order, an A chord would sound nice in there as well.

I played through using C#m - F#m - B - G#m and C#m - F#m - B - E and thought both sounded pretty nice.
#3
thanks alot man
RIG

Marshall MG 50DFX
Fender Stratocaster
Epiphone Les Paul Standered
Dunlop Original Cry Baby
Yamaha APX5A
RP 350