jonniez, the car in the picture is not mine. saw it while I was at my mech's the other day. he does a lot of these conversions to jag's, merc, bimmers, altezza, etc.
HP for RB20 is around 220. RB25 is around 250 (??? can't remember already), 1J is around 280 and 2J is around 280-320.
Price dunno man. But 1J with VVTI as in the pics is in demand so more expensive.