As Sherwood said, what is wrong with the engine in your car now?

If it spun a rod bearing, then you can consider the Rods and Crank trash. You should never reuse a rod, or crankshaft that spun a bearing. Even if it is micro polished, chances are it will happen again. Honda crankshafts are forged and if you grind, or turn a forged crankshaft you will loose most of its durability.

Assuming you have a GSR, and the new block doesn't need a bore, your internals can be swapped over. You will still need to replace the bearings, rings, oil pump, water pump, timing belt, tensioner, all gaskets, seals, etc. And it makes sense to have the flywheel resurfaced and get a new clutch. So consider a few thousand dollars in the end.

If you plan on turbo charging your car at some point, it makes more sense to buy forged pistons & rods now and just rebuild everything else to OEM spec. It will only cost you an additional $500-$700.