Sorry about the ass question of what color is it but, you have to give us more data.
Is this your only car, winter beater, daily driver that you drive 100 miles a day to work, a weekend toy, ?????
Keep it in mind that the H23 has FRM sleeves which are not the most boost happy so, if you plan on 400+ ponies, that would need re-sleeved. Also, if you are on a tight budget over all, a turbo motor will use more fuel to prevent detonation (and you will play more).
On top of all that, to build a turbo motor/car with a motor change, it will run more than $5K unless you can do most of the work yourself and have the stuff laying around or can get killer deals.