what is a good stall converter

i have 340 combo using a 3800 ptc convertor, works great. believe it or not on et streets it will foot break to 3900 and flash around 4400-4500. did i mention it drives like a cadaliac on the highway. for $400 it the best money i've spent on a convertor and the next will be a ptc also. they have a very nice service department and will build anything you want. also tried a 9.5 dynamic it worked great on the track and highway but had trouble with it pushing the crank forward. maybe just a bad one don't know? next time i switched almost everything, to ruined steel cranks get expensive. for prices ptc or ati a best values.