One to watch out for is your total wattage consumption.
The V Strom (Pre 08) outputs at 375 Watts using 200 Watts as default. This leaves you spare capacity of 175 Watts to play with. If you have heated grips, these pull about another 40 Watts.
Auxillary lights will push another 110 Watts if you go for 2 x 55 Watt lights leaving only 25 Watts left for Sat Nav and additional accessories.
Work your power consumption out before investing. If pushing the limit, it may be advisable to have 2 x 35 Watt auxillary lights instead.
Regards, Mad Dog