If you truely are looking for your money's worth,then Stowa is your only real choice! IWC is a fine watch,but at five times the cost of the Stowa,it is simply not five times better! If you are looking to buy the Zenith,buy the Stowa and pocket the four thousand dollars!
Another thing to consider is resale,you will have no trouble selling your Stowa if you choose to do so,check the sells corner and you will see the WTB list is quite long! You won't be stuck with a watch you don't like,though I doubt you will want to sell it once you hold it in your hand,it is such a high quality piece!!!
If you visit the Stowa forum you will see that there is a great following for Stowa,that is not without justification,they are such well made watches at prices that are hard to believe! I have several Stowas and for me it is hard to pick a favorite,they are all unique and well made.
I don't want you to misunderstand me, while I am a fan of Stowa watches, I do realize that there are other great watch companies out there, IWC being one of them! I particularly like the Aquatimer 2000 by IWC and one day will have one in my collection(hopefully this year),but we are talkng about Fleiger style watches and pound per pound the Stowa cannot be beat!
There were five companies that made Fleigers during WWII, STOWA,IWC,LACO,A.LANGE,AND WEMPE,only Stowa,IWC and LACO currently produce these type watches with LACO making the most historicaly accurate watch. Of these,Stowa and LACO are your best bet,price and quality are excellent and of these two,Stowa will have the better resale value if you do decide to sell.
These pictures are of my Stowa Fleiger B dial and my Stowa Marine Original, they are wonderfully detailed!
No matter which watch you decide on you will be pleased!