If it were me, I would rather buy a deal on a tranny and motor and just rebuild both myself. That way YOU KNOW what is done to it exaclty and that it was done the RIGHT way which is a problem for some people to understand or follow for some odd reason. I was going through this before I got a tranny. I had a choice between spending 950 bucks having a tranny shop build me a C4 tranny or buying a recently built C4 with about 10,000 miles on it. I thought that I might as well get a brand new one and not have to worry about it and get it built to my liking. So now I have a tranny I want, inline cooler, 2300-2500 stall (for my cam I had to have a stall anyways and we couldnt get a 1500 stall like I wanted though) and then a shift kit, etc.
If you dont have time to wait then I guess you can go the other option and you will just have to fall back on luck and if things break then you will have to replace them until it's all fixed and bugs are worked out.