B19C doesn't exist - u may have mis-typed (it's B18C).
JDM ITR is a good motor.
B20 will be relatively inexpensive - and very torquey not to mention great to turbo.
The B18C1 is the 94-01 Integra GSR motor (or the JDM 94-01 Integra Si-G). 170hp (USDM) or 178hp (JDM). A very, very good motor - extremely popular and will run you around...3500 bones.
The JDM ITR motor or B18C-Spec-R (B18C5 in the US). USDM has 195hp and the JDM has 205hp. Both extremely wonderful motors, but very expensive at around 5500.
B20B/Z. Great motor. You'll have to source out a Front-wheel drive B-Series transmission (out of a Integra or Civic Si - 99-00 - or a 93-97 del Sol VTEC) and axles (again any B-Series axles will most likely fit). Not sure on the price on this one - very cheap though.
Or, you can go for the inexpensive B16A motor (same found in the 99-00 Si and the 93-97 del Sol VTEC, as well as in MANY JDM applications). Only will cost u around 2500.
www.sohfast.com is a great place to buy motors and Jerome (the owner) is cool
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