As colin sid the Shearwater or the VR3. I like Gradient Factor deco so I prefer the Shearwater I also like the fact it can monitor all three cells on a CCR so again i go for the Shearwater.
SHearwater down load package and graph production is much nicer than the VR3 as well.
However, it's a house brick which puts a lot of people off.
VR3 is fine. Id get the VPM version if i got one today but i ran two of the older ones for a few years and thaught they were great but the deco is very conservitive even on zero safety so if you are in to faster deco you might want to consider the Shearwater again.
ATB
Mark
Example of a Shearwater profile Hatched red is the deco. wiggly line is ascent:
