I found two I'm interested in but don't realy know much about the specs, so I need some advice.
Turbo #1
Garrett T3
.60 trim
.60 ar compressor
.63 or .48 turbine
Turbo #2
T3 .45 trim
.42 ar compressor
.48 turbine
I'm going to be running this on a stock engine for now until my other one is ready. .20 over JE pistons, Eagle rods, AEM adj cam gears, AEM fuel rail, Crane turbo cams, pt rockers and lifters, udp etc. Which would be my best choice? Thanks In advance.

The first. They aren't too different in size but you'll get a little bit better top end from the top one.

-"Easy Mac"
05 Mazda RX-8 (RR8 #88)
99 Eclipse RS 398whp & 372lb-ft

i have used both. the same exact sizes. i loved the 45 but after a year and a half i went to the 60mm. i saw peak boost with the small turbo by 4k. 13psi. now i'm seeing the same boost about 39-4100 rpm. pretty much the same. i got a very small amount of top end from the bigger one though. its a better choice for the long run.

got that megasquirt!