Originally Posted by MPLexus301
What is a Lexus RS200?
AS200 (sedan or wagon) – 2.0-liter 1G-FE inline-six, 160 hp JIS (118 kW) or 155 PS (114 kW), rear-wheel drive or 4WD; sold by Lexus as the IS 200
RS200 (sedan) – 2.0-liter Yamaha-tuned 3S-GE inline-4, 200 hp JIS (148 kW), rear-wheel drive, not sold outside Japan by Lexus
AS300 (Gita wagon) – 3.0-liter 2JZ-GE inline-6, 220 hp JIS (162 kW) or 215 hp SAE (160 kW), rear-wheel drive or 4WD; sold by Lexus (sedan or wagon) as the IS 300
as for the original question...I'd choose the RS200 with the Beam's 4cyl. structure wise, they should be the same but you can make use of the Beam's 4cyl as you await the 2JZ swap you're after. if you're going to add substantial power, looking into partial caging and added tower parts, plus the plethora of suspension parts available to that gen IS
as for tranny, it doesn't get better than the 6sp getrag...but I would never discount the automatic, especially if going high power. look into the chevy tranny with adaptor combo