Okay, so one could Texas transfer to spades. Or, if feeling adventurous, one could Jacoby transfer to spades and then bid 4S, which for my partnership is a mild slam try without shortness. Partner won't like his spades, but if he has a ton of controls...
Is there any form of scoring (matchpoints, BAM) at which you would consider playing 3NT? If you do decide you might want to play 3NT, do you blast it or go some other route?