I have a Cadet , find it too small in the hand and don't find much use for the nail file . The Soldier and Pioneer are just about identical , just a different sheild and Civilian Vs. Military cross . Depends how you feel about lanyard rings . Another consideration- Vic Soldiers are no longer made ( tho still plentifull ) , Pioneers will continue to be made in the forseable future . Get em while they are still around . I have a Wenger SI , it has a good bail , the blade has a tad bit more belly than the Soldier. It's a Mil Spec piece , and is better quality than normal Wengers , and even uses a Vic. Style can opener .
I like the Soldier , it's just a classic ! The Farmer is another choice perhaps you haven't thought of ( Pioneer with a saw ). A great piece for the woods . The extra thickness makes for a great hand feel , and doesn't detract from it as an EDC . The awls on all the above mentioned are sublime tools , very usefull - another strike against the Cadet . Alox is highly addictive .
A Rambler is a superb add on , scissors , nail file , #1 philips ( Magnetic ) . The can opener is fair for driving # 2 philips screws . I really dony understand why anyone buys classics , the Rambler is just so much better !
Chris