Originally Posted by
CrimsonEclipse
All are good flying planes (340, 414, 421)
If possible, I'd go for 414A. No tip tanks, more fuel better performance.
The only issue with the 414A/421C is that with the wet wing, they fall under the Service Bulletin (SB) for the wing spar.
The tip tank models do not have the same wing and don't have that SB. Could be a costly ($70-80,000) thing if you're not careful with the aircraft that you potentially purchase. Be sure to read this post on AOPA before purchasing a 414A.
AOPA Online: Regulatory Brief -- FAA proposed twin Cessna wing spar ADs