Pretty doubles in CASSIOPEIA Other constellations:
Scope
Name
Magn. Sep. Remarks
Real favourites:
AT80
MK67
Eta Cas
3.4 - 7.5 11" Deep-yellow and red. Also beautiful with larger scopes (rating 2.) 
CG11
Iota Cas
4.6 - 6.9 - 7.1 2.5" - 7.5" Beautiful triple system. B is yellow, C is ruddy
AT80 GS80 CG11

OS 254

7.6 - 8.7 58" Deep-orange and blue. Striking colors and nice view with low power (20x). Colors are even more striking with larger scopes. Rich field
Better than average:
LX10 CG11
Sigma Cas
5 - 7.1 3" Very rich field 
CG11
Struve 59
6.9 - 8.1 2" White and yellow 
CG11
Struve 70
6.3 - 9.3 - 9.8 8" - 78" Pretty with low power, very rich field 
LX10
Struve 163
7.1 - 9.1 - 10.4 35" - 115" A-B are orange and blue 
CG11
Struve 3037
7 - 8.6 - 9 3" - 29" A is deep-yellow
LX10
Struve 3038
10.7 -11.2 4.4" Faint but pretty
LX10
Burnham 1
7.8 - 9.8 - 8.8 2" - 3" Multiple system with some more faint components which lies in the nebula NGC281 
LX10
Arg 3
9 - 9.9 20.4" Rich field, with 67x Gamma Cas in same FOV