Agreed rb25 turbo.
But be warned, these also have a ceramic turbine so can fail just like your current run did.
If you are on a budget, then i assume you don't have the cash for fuel pump, injectors, ecu, tunning, etc. If this is the case, just get a standard rb25 (and keep boost at 11psi) or buy another rb20 turbo. The rb25 turbo will be laggier than the stock turbo.