If you have a budget of only $1k, don't even consider swapping gearsets. The EJ 5-speed is pretty labor intensive to rebuild and honestly, not something that most DIYers should tackle. Lots of tolerance stack up that will quickly ruin the trans if you get it wrong.
Our 2002 WRX has 152k miles on the original transmission. It's had a lightweight flywheel and Exedy Stage 1 clutch for the last 63k miles. Before that it was raced by dual-drivers in as many as 15 autocrosses per year. The center differential is finally starting to show signs of age. I don't for one second think these are "glass" transmissions, then again, we never side-stepped the clutch, just soft but quick launches. Each year after 2002 got incremental improvements, so the '07 USDM 5-speeds are as strong as the JDM boxes. The FD in these boxes is pretty low and the gearing is long.
I might try to find a '93 WRX transmission. 4.11 FD and really short gears, shorter than any 4.44 JDM box.