700r4 continues! GOT QUESTIOS AGAIN????

[sam's 72]

Ok guys, I went to talk with a tranny guy today, now tell me which way would you go, and think about how much these trannys cost to rebuild every time they blow up! I can either go with a TH350 with the 1st and 2nd gear changed out to lower gears, with a 3:23 rear gear it would pull out the gate like it had a set of 4:45 gears in the back, then in 3rd I would have a 3:23 gear 1 to 1, or go with a 700r4 with 4;11 or 4:56, now I am stuped on which one to go with, the 700 is so tempermental, and the cost is a lot more when they burn up, that is the down side to the 700 now the th350, I dont know what the difference it would be in gas mileage going with a 3:23 rear gear with lower 1st and 2nd gear changed out in the th350, I can get a 700r4 for $ 500, with stock converter, or have my th350 rebuilt builit proof for $ 750 and thats with a 2200 stahl converter, tell me what you guy think?
I know I know I keep asking about these 700r4s but man I just am very very undecided with this, I like the ideasl of a th350 with the lower gears installed and running a 3:23 rear gear.
sam