I would NEVER pay 350 for a T25.
Box, you COULD run an S14 T28 on stock wastegate pressure. (The stock S14 SR injectors are that of an S13 SR: 370cc injectors and you could even run your SR MAFS) It would be a great step in the right direction.
IF you decide to go that route, make sure your T28 comes with
-O2 housing
-Inlet and Outlets
-Oil and Coolant feed/returns
and if you could track down an S14 SR waterneck.. or be like me and dont run coolant to your turbo.. lol.. (I just run oil-feed/return and block off coolant lines off the block)
T25 is your best bet, but you will feel a significant gain over T25 w/ T28 EVEN on stock pressure.
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RIP Tim Aldrich
"..watch this
cool documentary on bums racing shopping carts downhill, and making a living off of selling bottles. living the dream."