1. B18B (140hp) - RS, LS, GS B18C1 (170hp w/ VTEC) - GSR B18C5 (195hp w/ VTEC) - Type-R2. I'd say Type-R, sure it's more likely to be stolen but just means you have to keep a better eye on it and put some money into a good alarm.3. No, not properly tuned anyways4a. PSI is how much boost a turbo engine has, this is worthless number because a bigger turbo with less pressure can still put in more air than a small turbo with more pressure.4b. RPM is revolutions per minute, it's on the tach and the higher it goes the louder your engine will be and the faster your car will go. Acuras rev pretty high but if you get a manual don't redline it unless you know what you are doing.