If you aren't on a strict budget, there's a newer LA-2A emulation from
Black Rooster Audio. It's very good, but pricey at $129.
A demo is essential, since although the tone and saturation modeling are really nice -- it does sound like a vintage unit -- you may or may not dig the compression action, which can get rather pumpy on some material.
Here's a video that gives you an idea of how it performs.
Cheers,
Eddie