With 10k, you could sleeve a B18 to an 84mm bore (2.0L displacement), build a solid bottom end with forged components, build a head with a reliable valvetrain and good cams, and still have money left over for a good engine management system.
The only part that is really different for the B20 is the pistons...they have an 84mm bore instead of an 81mm bore. We use CP Pistons for 84mm blocks. They are available in a variety of compression ratios from 8.5:1 to 12.5:1, and have proven to be very reliable under extreme load.