RE: 440 or 426?
Having experience with both as well, the hemi is less impressive off the line but comes on like nothing else...period.
The 440 is an excellent torque monster and even better w/ 6pak set up.
Besides tuning the hemi, solid lifters add a whole other set of variables, and time. But NOTHING breathes like a hemi, especially on a cool evening, like adding 50 HP...
Overall, tough choice, but 440 is definetly less headaches...and easier on the wallet.