RE: which sub???
OK here is the scoop about what is what...a "Who is Who" of RC Subs
Blue sub-- Nikko Daring A.K.A. Tigershark
Red/Silver--RS Mako Shark
Black sub=Wallysub converted to Seawolf
Black-Red sub-Wallysub Dallas
all fun to use but the Blue sub has a small range but excellant diving properties!
the RS sub can dive turn and suraface quickly but be warned, grease the crap out of the seals and the front LED, they are leakers!
the Wally subs are in my opinion the best bang for your buck, not only can they dive deep, but you can modify them to the point
the US Navy wants them! :-)
I hope this helps.
Mark