I really recommend you save a little more and go with the vtec. i wish i had when i bought the si... then i turbocharged it, and spent way too much and it didnt run so well cos i got d1cked around by a 'workshop' despite them having a good reputation.
Vtec is fun :) and the resale value will be slightly better. There is not much difference in price between Si and VTEC these days. Back when I was looking, it was a $5k difference.
Having said that, the Si has a fair bit of grunt, and once I lowered it, it was better to drive. It's quite a comfy car stock standard, unless you lower it and get low profile tyres, you will FEEL the potholes. It is perhaps quite loud in the cabin compared to other cars...

