The "Classic" is a risky foray into Pulsar ownership. A P2 or Date Command is a much better bet, as there is a much larger pool of modules out there, since there were products by Hamilton and Omega that used the same module. The Classic(and Executive) are "orphan" products, holding a module that was only put into Pulsar watches. It is also not the most robust module(strictly my opinion, don't beat me up on this). And some day in the future, when people are a little more open to the idea of "Frankenstiening" a newer module into an old case, the Executive,Classic and Dress models will not be eligible for the transplants generally, since there isn't much room inside the cases, unlike the P2 and P3.
But hey, a Classic is a very nice watch, just as the Executive and Dress are.